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Finding the Fourth Proportional to 968.62, 1,337.16 and 689.44

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Solution

The fourth proportional to 968.62, 1,337.16 and 689.44 is: 951.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.62 : 1,337.16 = 689.44 : x
  2. Step 2: Convert to fraction form
    968.62/1,337.16 = 689.44/x
  3. Step 3: Cross multiply
    968.62x = 1,337.16 × 689.44
  4. Step 4: Simplify right side
    968.62x = 921,891.59
  5. Step 5: Solve for x
    x = 921,891.59/968.62
  6. Step 6: Final answer
    x = 951.76

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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.