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Finding the Fourth Proportional to 398,640,281.60, 597,960,422.40 and 217,241,753.60

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Solution

The fourth proportional to 398,640,281.60, 597,960,422.40 and 217,241,753.60 is: 325,862,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,640,281.60 : 597,960,422.40 = 217,241,753.60 : x
  2. Step 2: Convert to fraction form
    398,640,281.60/597,960,422.40 = 217,241,753.60/x
  3. Step 3: Cross multiply
    398,640,281.60x = 597,960,422.40 × 217,241,753.60
  4. Step 4: Simplify right side
    398,640,281.60x = 129,901,970,745,572,704
  5. Step 5: Solve for x
    x = 129,901,970,745,572,704/398,640,281.60
  6. Step 6: Final answer
    x = 325,862,630.40

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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.