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Finding the Fourth Proportional to 718.04, 991.14 and 531.74

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Solution

The fourth proportional to 718.04, 991.14 and 531.74 is: 733.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.04 : 991.14 = 531.74 : x
  2. Step 2: Convert to fraction form
    718.04/991.14 = 531.74/x
  3. Step 3: Cross multiply
    718.04x = 991.14 × 531.74
  4. Step 4: Simplify right side
    718.04x = 527,028.78
  5. Step 5: Solve for x
    x = 527,028.78/718.04
  6. Step 6: Final answer
    x = 733.98

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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.