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Finding the Fourth Proportional to 721.11, 995.05 and 426.27

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Solution

The fourth proportional to 721.11, 995.05 and 426.27 is: 588.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.11 : 995.05 = 426.27 : x
  2. Step 2: Convert to fraction form
    721.11/995.05 = 426.27/x
  3. Step 3: Cross multiply
    721.11x = 995.05 × 426.27
  4. Step 4: Simplify right side
    721.11x = 424,159.96
  5. Step 5: Solve for x
    x = 424,159.96/721.11
  6. Step 6: Final answer
    x = 588.20

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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.