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Finding the Fourth Proportional to 637.88, 878.11 and 572.36

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Solution

The fourth proportional to 637.88, 878.11 and 572.36 is: 787.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.88 : 878.11 = 572.36 : x
  2. Step 2: Convert to fraction form
    637.88/878.11 = 572.36/x
  3. Step 3: Cross multiply
    637.88x = 878.11 × 572.36
  4. Step 4: Simplify right side
    637.88x = 502,589.22
  5. Step 5: Solve for x
    x = 502,589.22/637.88
  6. Step 6: Final answer
    x = 787.91

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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.