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Finding the Fourth Proportional to 718.10, 991.22 and 552.09

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Solution

The fourth proportional to 718.10, 991.22 and 552.09 is: 762.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.10 : 991.22 = 552.09 : x
  2. Step 2: Convert to fraction form
    718.10/991.22 = 552.09/x
  3. Step 3: Cross multiply
    718.10x = 991.22 × 552.09
  4. Step 4: Simplify right side
    718.10x = 547,239.89
  5. Step 5: Solve for x
    x = 547,239.89/718.10
  6. Step 6: Final answer
    x = 762.07

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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.