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Finding the Fourth Proportional to 616.61, 925.46 and 520.49

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Solution

The fourth proportional to 616.61, 925.46 and 520.49 is: 781.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.61 : 925.46 = 520.49 : x
  2. Step 2: Convert to fraction form
    616.61/925.46 = 520.49/x
  3. Step 3: Cross multiply
    616.61x = 925.46 × 520.49
  4. Step 4: Simplify right side
    616.61x = 481,690.07
  5. Step 5: Solve for x
    x = 481,690.07/616.61
  6. Step 6: Final answer
    x = 781.19

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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.