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Finding the Fourth Proportional to 625.71, 938.67 and 553.29

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Solution

The fourth proportional to 625.71, 938.67 and 553.29 is: 830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.71 : 938.67 = 553.29 : x
  2. Step 2: Convert to fraction form
    625.71/938.67 = 553.29/x
  3. Step 3: Cross multiply
    625.71x = 938.67 × 553.29
  4. Step 4: Simplify right side
    625.71x = 519,356.72
  5. Step 5: Solve for x
    x = 519,356.72/625.71
  6. Step 6: Final answer
    x = 830.03

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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.