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Finding the Fourth Proportional to 502.11, 693.25 and 315.89

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Solution

The fourth proportional to 502.11, 693.25 and 315.89 is: 436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.11 : 693.25 = 315.89 : x
  2. Step 2: Convert to fraction form
    502.11/693.25 = 315.89/x
  3. Step 3: Cross multiply
    502.11x = 693.25 × 315.89
  4. Step 4: Simplify right side
    502.11x = 218,990.74
  5. Step 5: Solve for x
    x = 218,990.74/502.11
  6. Step 6: Final answer
    x = 436.14

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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.