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Finding the Fourth Proportional to 462.92, 694.98 and 319.55

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Solution

The fourth proportional to 462.92, 694.98 and 319.55 is: 479.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.92 : 694.98 = 319.55 : x
  2. Step 2: Convert to fraction form
    462.92/694.98 = 319.55/x
  3. Step 3: Cross multiply
    462.92x = 694.98 × 319.55
  4. Step 4: Simplify right side
    462.92x = 222,077.38
  5. Step 5: Solve for x
    x = 222,077.38/462.92
  6. Step 6: Final answer
    x = 479.74

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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.