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Finding the Fourth Proportional to 462.75, 694.39 and 319.11

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Solution

The fourth proportional to 462.75, 694.39 and 319.11 is: 478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.75 : 694.39 = 319.11 : x
  2. Step 2: Convert to fraction form
    462.75/694.39 = 319.11/x
  3. Step 3: Cross multiply
    462.75x = 694.39 × 319.11
  4. Step 4: Simplify right side
    462.75x = 221,586.79
  5. Step 5: Solve for x
    x = 221,586.79/462.75
  6. Step 6: Final answer
    x = 478.85

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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.