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Finding the Fourth Proportional to 501.18, 691.16 and 314.61

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Solution

The fourth proportional to 501.18, 691.16 and 314.61 is: 433.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.18 : 691.16 = 314.61 : x
  2. Step 2: Convert to fraction form
    501.18/691.16 = 314.61/x
  3. Step 3: Cross multiply
    501.18x = 691.16 × 314.61
  4. Step 4: Simplify right side
    501.18x = 217,445.85
  5. Step 5: Solve for x
    x = 217,445.85/501.18
  6. Step 6: Final answer
    x = 433.87

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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.