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Finding the Fourth Proportional to 621.46, 927.92 and 530.11

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Solution

The fourth proportional to 621.46, 927.92 and 530.11 is: 791.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.46 : 927.92 = 530.11 : x
  2. Step 2: Convert to fraction form
    621.46/927.92 = 530.11/x
  3. Step 3: Cross multiply
    621.46x = 927.92 × 530.11
  4. Step 4: Simplify right side
    621.46x = 491,899.67
  5. Step 5: Solve for x
    x = 491,899.67/621.46
  6. Step 6: Final answer
    x = 791.52

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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.