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Finding the Fourth Proportional to 721.21, 995.05 and 426.37

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Solution

The fourth proportional to 721.21, 995.05 and 426.37 is: 588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.21 : 995.05 = 426.37 : x
  2. Step 2: Convert to fraction form
    721.21/995.05 = 426.37/x
  3. Step 3: Cross multiply
    721.21x = 995.05 × 426.37
  4. Step 4: Simplify right side
    721.21x = 424,259.47
  5. Step 5: Solve for x
    x = 424,259.47/721.21
  6. Step 6: Final answer
    x = 588.26

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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.