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Finding the Fourth Proportional to 1,043.22, 1,439.39 and 649.97

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Solution

The fourth proportional to 1,043.22, 1,439.39 and 649.97 is: 896.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.22 : 1,439.39 = 649.97 : x
  2. Step 2: Convert to fraction form
    1,043.22/1,439.39 = 649.97/x
  3. Step 3: Cross multiply
    1,043.22x = 1,439.39 × 649.97
  4. Step 4: Simplify right side
    1,043.22x = 935,549.87
  5. Step 5: Solve for x
    x = 935,549.87/1,043.22
  6. Step 6: Final answer
    x = 896.79

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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.