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Finding the Fourth Proportional to 766.72, 1,149.04 and 458.72

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Solution

The fourth proportional to 766.72, 1,149.04 and 458.72 is: 687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.72 : 1,149.04 = 458.72 : x
  2. Step 2: Convert to fraction form
    766.72/1,149.04 = 458.72/x
  3. Step 3: Cross multiply
    766.72x = 1,149.04 × 458.72
  4. Step 4: Simplify right side
    766.72x = 527,087.63
  5. Step 5: Solve for x
    x = 527,087.63/766.72
  6. Step 6: Final answer
    x = 687.46

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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.