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Finding the Fourth Proportional to 543,288.78, 749,785.98 and 317,007.18

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Solution

The fourth proportional to 543,288.78, 749,785.98 and 317,007.18 is: 437,497.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,288.78 : 749,785.98 = 317,007.18 : x
  2. Step 2: Convert to fraction form
    543,288.78/749,785.98 = 317,007.18/x
  3. Step 3: Cross multiply
    543,288.78x = 749,785.98 × 317,007.18
  4. Step 4: Simplify right side
    543,288.78x = 237,687,539,123.34
  5. Step 5: Solve for x
    x = 237,687,539,123.34/543,288.78
  6. Step 6: Final answer
    x = 437,497.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.