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Finding the Fourth Proportional to 800,339,979.60, 1,200,509,969.40 and 664,291,083.60

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Solution

The fourth proportional to 800,339,979.60, 1,200,509,969.40 and 664,291,083.60 is: 996,436,625.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,339,979.60 : 1,200,509,969.40 = 664,291,083.60 : x
  2. Step 2: Convert to fraction form
    800,339,979.60/1,200,509,969.40 = 664,291,083.60/x
  3. Step 3: Cross multiply
    800,339,979.60x = 1,200,509,969.40 × 664,291,083.60
  4. Step 4: Simplify right side
    800,339,979.60x = 797,488,068,445,328,896
  5. Step 5: Solve for x
    x = 797,488,068,445,328,896/800,339,979.60
  6. Step 6: Final answer
    x = 996,436,625.40

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Double scale
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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.