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Finding the Fourth Proportional to 630.44, 868.11 and 519.72

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Solution

The fourth proportional to 630.44, 868.11 and 519.72 is: 715.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.44 : 868.11 = 519.72 : x
  2. Step 2: Convert to fraction form
    630.44/868.11 = 519.72/x
  3. Step 3: Cross multiply
    630.44x = 868.11 × 519.72
  4. Step 4: Simplify right side
    630.44x = 451,174.13
  5. Step 5: Solve for x
    x = 451,174.13/630.44
  6. Step 6: Final answer
    x = 715.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.