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Finding the Fourth Proportional to 721.48, 995.41 and 426.69

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Solution

The fourth proportional to 721.48, 995.41 and 426.69 is: 588.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.48 : 995.41 = 426.69 : x
  2. Step 2: Convert to fraction form
    721.48/995.41 = 426.69/x
  3. Step 3: Cross multiply
    721.48x = 995.41 × 426.69
  4. Step 4: Simplify right side
    721.48x = 424,731.49
  5. Step 5: Solve for x
    x = 424,731.49/721.48
  6. Step 6: Final answer
    x = 588.69

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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.