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Finding the Fourth Proportional to 842.43, 1,259.21 and 731.87

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Solution

The fourth proportional to 842.43, 1,259.21 and 731.87 is: 1,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.43 : 1,259.21 = 731.87 : x
  2. Step 2: Convert to fraction form
    842.43/1,259.21 = 731.87/x
  3. Step 3: Cross multiply
    842.43x = 1,259.21 × 731.87
  4. Step 4: Simplify right side
    842.43x = 921,568.07
  5. Step 5: Solve for x
    x = 921,568.07/842.43
  6. Step 6: Final answer
    x = 1,093.94

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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.