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Finding the Fourth Proportional to 721.14, 995.04 and 426.50

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Solution

The fourth proportional to 721.14, 995.04 and 426.50 is: 588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.14 : 995.04 = 426.50 : x
  2. Step 2: Convert to fraction form
    721.14/995.04 = 426.50/x
  3. Step 3: Cross multiply
    721.14x = 995.04 × 426.50
  4. Step 4: Simplify right side
    721.14x = 424,384.56
  5. Step 5: Solve for x
    x = 424,384.56/721.14
  6. Step 6: Final answer
    x = 588.49

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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.