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Finding the Fourth Proportional to 659,624.60, 989,436.90 and 260,132.60

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Solution

The fourth proportional to 659,624.60, 989,436.90 and 260,132.60 is: 390,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,624.60 : 989,436.90 = 260,132.60 : x
  2. Step 2: Convert to fraction form
    659,624.60/989,436.90 = 260,132.60/x
  3. Step 3: Cross multiply
    659,624.60x = 989,436.90 × 260,132.60
  4. Step 4: Simplify right side
    659,624.60x = 257,384,793,332.94
  5. Step 5: Solve for x
    x = 257,384,793,332.94/659,624.60
  6. Step 6: Final answer
    x = 390,198.90

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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.