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Finding the Fourth Proportional to 437,572.78, 656,359.10 and 105,148.78

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Solution

The fourth proportional to 437,572.78, 656,359.10 and 105,148.78 is: 157,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,572.78 : 656,359.10 = 105,148.78 : x
  2. Step 2: Convert to fraction form
    437,572.78/656,359.10 = 105,148.78/x
  3. Step 3: Cross multiply
    437,572.78x = 656,359.10 × 105,148.78
  4. Step 4: Simplify right side
    437,572.78x = 69,015,358,606.90
  5. Step 5: Solve for x
    x = 69,015,358,606.90/437,572.78
  6. Step 6: Final answer
    x = 157,723.15

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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.