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Finding the Fourth Proportional to 691.01, 953.25 and 454.71

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Solution

The fourth proportional to 691.01, 953.25 and 454.71 is: 627.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.01 : 953.25 = 454.71 : x
  2. Step 2: Convert to fraction form
    691.01/953.25 = 454.71/x
  3. Step 3: Cross multiply
    691.01x = 953.25 × 454.71
  4. Step 4: Simplify right side
    691.01x = 433,456.73
  5. Step 5: Solve for x
    x = 433,456.73/691.01
  6. Step 6: Final answer
    x = 627.28

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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.