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Finding the Fourth Proportional to 621.27, 932.51 and 347.90

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Solution

The fourth proportional to 621.27, 932.51 and 347.90 is: 522.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.27 : 932.51 = 347.90 : x
  2. Step 2: Convert to fraction form
    621.27/932.51 = 347.90/x
  3. Step 3: Cross multiply
    621.27x = 932.51 × 347.90
  4. Step 4: Simplify right side
    621.27x = 324,416.44
  5. Step 5: Solve for x
    x = 324,416.44/621.27
  6. Step 6: Final answer
    x = 522.18

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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.