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Finding the Fourth Proportional to 721.54, 995.59 and 426.79

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Solution

The fourth proportional to 721.54, 995.59 and 426.79 is: 588.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.54 : 995.59 = 426.79 : x
  2. Step 2: Convert to fraction form
    721.54/995.59 = 426.79/x
  3. Step 3: Cross multiply
    721.54x = 995.59 × 426.79
  4. Step 4: Simplify right side
    721.54x = 424,904.30
  5. Step 5: Solve for x
    x = 424,904.30/721.54
  6. Step 6: Final answer
    x = 588.89

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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.