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Finding the Fourth Proportional to 691.97, 954.99 and 397.26

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Solution

The fourth proportional to 691.97, 954.99 and 397.26 is: 548.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.97 : 954.99 = 397.26 : x
  2. Step 2: Convert to fraction form
    691.97/954.99 = 397.26/x
  3. Step 3: Cross multiply
    691.97x = 954.99 × 397.26
  4. Step 4: Simplify right side
    691.97x = 379,379.33
  5. Step 5: Solve for x
    x = 379,379.33/691.97
  6. Step 6: Final answer
    x = 548.26

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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.