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Finding the Fourth Proportional to 833.72, 1,250.15 and 487.73

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Solution

The fourth proportional to 833.72, 1,250.15 and 487.73 is: 731.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.72 : 1,250.15 = 487.73 : x
  2. Step 2: Convert to fraction form
    833.72/1,250.15 = 487.73/x
  3. Step 3: Cross multiply
    833.72x = 1,250.15 × 487.73
  4. Step 4: Simplify right side
    833.72x = 609,729.41
  5. Step 5: Solve for x
    x = 609,729.41/833.72
  6. Step 6: Final answer
    x = 731.34

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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.