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Finding the Fourth Proportional to 627,221.80, 865,640.28 and 372,574

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Solution

The fourth proportional to 627,221.80, 865,640.28 and 372,574 is: 514,196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,221.80 : 865,640.28 = 372,574 : x
  2. Step 2: Convert to fraction form
    627,221.80/865,640.28 = 372,574/x
  3. Step 3: Cross multiply
    627,221.80x = 865,640.28 × 372,574
  4. Step 4: Simplify right side
    627,221.80x = 322,515,061,680.72
  5. Step 5: Solve for x
    x = 322,515,061,680.72/627,221.80
  6. Step 6: Final answer
    x = 514,196.19

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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.