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Finding the Fourth Proportional to 800,339,793.60, 1,200,509,690.40 and 664,290,897.60

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Solution

The fourth proportional to 800,339,793.60, 1,200,509,690.40 and 664,290,897.60 is: 996,436,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,339,793.60 : 1,200,509,690.40 = 664,290,897.60 : x
  2. Step 2: Convert to fraction form
    800,339,793.60/1,200,509,690.40 = 664,290,897.60/x
  3. Step 3: Cross multiply
    800,339,793.60x = 1,200,509,690.40 × 664,290,897.60
  4. Step 4: Simplify right side
    800,339,793.60x = 797,487,659,813,314,176
  5. Step 5: Solve for x
    x = 797,487,659,813,314,176/800,339,793.60
  6. Step 6: Final answer
    x = 996,436,346.40

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Half scale
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Double scale
Find fourth proportional to 800,339,794.60, 1,200,509,691.90 and 664,290,898.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.