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Finding the Fourth Proportional to 717.26, 991.65 and 552.02

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Solution

The fourth proportional to 717.26, 991.65 and 552.02 is: 763.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.26 : 991.65 = 552.02 : x
  2. Step 2: Convert to fraction form
    717.26/991.65 = 552.02/x
  3. Step 3: Cross multiply
    717.26x = 991.65 × 552.02
  4. Step 4: Simplify right side
    717.26x = 547,410.63
  5. Step 5: Solve for x
    x = 547,410.63/717.26
  6. Step 6: Final answer
    x = 763.20

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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.