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Finding the Fourth Proportional to 621.61, 927.17 and 529.27

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Solution

The fourth proportional to 621.61, 927.17 and 529.27 is: 789.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.61 : 927.17 = 529.27 : x
  2. Step 2: Convert to fraction form
    621.61/927.17 = 529.27/x
  3. Step 3: Cross multiply
    621.61x = 927.17 × 529.27
  4. Step 4: Simplify right side
    621.61x = 490,723.27
  5. Step 5: Solve for x
    x = 490,723.27/621.61
  6. Step 6: Final answer
    x = 789.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.