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Finding the Fourth Proportional to 837.87, 1,250.78 and 728.52

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Solution

The fourth proportional to 837.87, 1,250.78 and 728.52 is: 1,087.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.87 : 1,250.78 = 728.52 : x
  2. Step 2: Convert to fraction form
    837.87/1,250.78 = 728.52/x
  3. Step 3: Cross multiply
    837.87x = 1,250.78 × 728.52
  4. Step 4: Simplify right side
    837.87x = 911,218.25
  5. Step 5: Solve for x
    x = 911,218.25/837.87
  6. Step 6: Final answer
    x = 1,087.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.