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Finding the Fourth Proportional to 869.00, 1,200.56 and 728.87

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Solution

The fourth proportional to 869.00, 1,200.56 and 728.87 is: 1,006.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.00 : 1,200.56 = 728.87 : x
  2. Step 2: Convert to fraction form
    869.00/1,200.56 = 728.87/x
  3. Step 3: Cross multiply
    869.00x = 1,200.56 × 728.87
  4. Step 4: Simplify right side
    869.00x = 875,042.52
  5. Step 5: Solve for x
    x = 875,042.52/869.00
  6. Step 6: Final answer
    x = 1,006.96

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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.