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Finding the Fourth Proportional to 437,505.36, 656,272.17 and 137,988.78

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Solution

The fourth proportional to 437,505.36, 656,272.17 and 137,988.78 is: 206,987.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,505.36 : 656,272.17 = 137,988.78 : x
  2. Step 2: Convert to fraction form
    437,505.36/656,272.17 = 137,988.78/x
  3. Step 3: Cross multiply
    437,505.36x = 656,272.17 × 137,988.78
  4. Step 4: Simplify right side
    437,505.36x = 90,558,196,086.25
  5. Step 5: Solve for x
    x = 90,558,196,086.25/437,505.36
  6. Step 6: Final answer
    x = 206,987.63

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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.