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Finding the Fourth Proportional to 616.28, 923.16 and 519.79

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Solution

The fourth proportional to 616.28, 923.16 and 519.79 is: 778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.28 : 923.16 = 519.79 : x
  2. Step 2: Convert to fraction form
    616.28/923.16 = 519.79/x
  3. Step 3: Cross multiply
    616.28x = 923.16 × 519.79
  4. Step 4: Simplify right side
    616.28x = 479,849.34
  5. Step 5: Solve for x
    x = 479,849.34/616.28
  6. Step 6: Final answer
    x = 778.62

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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.