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Finding the Fourth Proportional to 691.25, 953.97 and 458.42

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Solution

The fourth proportional to 691.25, 953.97 and 458.42 is: 632.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.25 : 953.97 = 458.42 : x
  2. Step 2: Convert to fraction form
    691.25/953.97 = 458.42/x
  3. Step 3: Cross multiply
    691.25x = 953.97 × 458.42
  4. Step 4: Simplify right side
    691.25x = 437,318.93
  5. Step 5: Solve for x
    x = 437,318.93/691.25
  6. Step 6: Final answer
    x = 632.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.