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Finding the Fourth Proportional to 427,221.25, 640,412.70 and 237,772.38

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Solution

The fourth proportional to 427,221.25, 640,412.70 and 237,772.38 is: 356,425.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,221.25 : 640,412.70 = 237,772.38 : x
  2. Step 2: Convert to fraction form
    427,221.25/640,412.70 = 237,772.38/x
  3. Step 3: Cross multiply
    427,221.25x = 640,412.70 × 237,772.38
  4. Step 4: Simplify right side
    427,221.25x = 152,272,451,861.23
  5. Step 5: Solve for x
    x = 152,272,451,861.23/427,221.25
  6. Step 6: Final answer
    x = 356,425.28

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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.