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Finding the Fourth Proportional to 721.06, 994.92 and 426.28

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Solution

The fourth proportional to 721.06, 994.92 and 426.28 is: 588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.06 : 994.92 = 426.28 : x
  2. Step 2: Convert to fraction form
    721.06/994.92 = 426.28/x
  3. Step 3: Cross multiply
    721.06x = 994.92 × 426.28
  4. Step 4: Simplify right side
    721.06x = 424,114.50
  5. Step 5: Solve for x
    x = 424,114.50/721.06
  6. Step 6: Final answer
    x = 588.18

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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.