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Finding the Fourth Proportional to 627,220.80, 865,638.90 and 372,573

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Solution

The fourth proportional to 627,220.80, 865,638.90 and 372,573 is: 514,194.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,220.80 : 865,638.90 = 372,573 : x
  2. Step 2: Convert to fraction form
    627,220.80/865,638.90 = 372,573/x
  3. Step 3: Cross multiply
    627,220.80x = 865,638.90 × 372,573
  4. Step 4: Simplify right side
    627,220.80x = 322,513,681,889.70
  5. Step 5: Solve for x
    x = 322,513,681,889.70/627,220.80
  6. Step 6: Final answer
    x = 514,194.81

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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.