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Finding the Fourth Proportional to 766.97, 1,149.01 and 424.25

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Solution

The fourth proportional to 766.97, 1,149.01 and 424.25 is: 635.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.97 : 1,149.01 = 424.25 : x
  2. Step 2: Convert to fraction form
    766.97/1,149.01 = 424.25/x
  3. Step 3: Cross multiply
    766.97x = 1,149.01 × 424.25
  4. Step 4: Simplify right side
    766.97x = 487,467.49
  5. Step 5: Solve for x
    x = 487,467.49/766.97
  6. Step 6: Final answer
    x = 635.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.