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Finding the Fourth Proportional to 716.82, 1,073.18 and 561.30

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Solution

The fourth proportional to 716.82, 1,073.18 and 561.30 is: 840.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.82 : 1,073.18 = 561.30 : x
  2. Step 2: Convert to fraction form
    716.82/1,073.18 = 561.30/x
  3. Step 3: Cross multiply
    716.82x = 1,073.18 × 561.30
  4. Step 4: Simplify right side
    716.82x = 602,375.93
  5. Step 5: Solve for x
    x = 602,375.93/716.82
  6. Step 6: Final answer
    x = 840.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.