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Finding the Fourth Proportional to 691.35, 951.99 and 494.52

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Solution

The fourth proportional to 691.35, 951.99 and 494.52 is: 680.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.35 : 951.99 = 494.52 : x
  2. Step 2: Convert to fraction form
    691.35/951.99 = 494.52/x
  3. Step 3: Cross multiply
    691.35x = 951.99 × 494.52
  4. Step 4: Simplify right side
    691.35x = 470,778.09
  5. Step 5: Solve for x
    x = 470,778.09/691.35
  6. Step 6: Final answer
    x = 680.95

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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.