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Finding the Fourth Proportional to 691.68, 952.32 and 626.88

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Solution

The fourth proportional to 691.68, 952.32 and 626.88 is: 863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.68 : 952.32 = 626.88 : x
  2. Step 2: Convert to fraction form
    691.68/952.32 = 626.88/x
  3. Step 3: Cross multiply
    691.68x = 952.32 × 626.88
  4. Step 4: Simplify right side
    691.68x = 596,990.36
  5. Step 5: Solve for x
    x = 596,990.36/691.68
  6. Step 6: Final answer
    x = 863.10

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1.5x scale

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.