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Finding the Fourth Proportional to 547,132.40, 820,007.40 and 487,689.20

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Solution

The fourth proportional to 547,132.40, 820,007.40 and 487,689.20 is: 730,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,132.40 : 820,007.40 = 487,689.20 : x
  2. Step 2: Convert to fraction form
    547,132.40/820,007.40 = 487,689.20/x
  3. Step 3: Cross multiply
    547,132.40x = 820,007.40 × 487,689.20
  4. Step 4: Simplify right side
    547,132.40x = 399,908,752,900.08
  5. Step 5: Solve for x
    x = 399,908,752,900.08/547,132.40
  6. Step 6: Final answer
    x = 730,917.70

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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.