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Finding the Fourth Proportional to 716.33, 1,074.72 and 456.55

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Solution

The fourth proportional to 716.33, 1,074.72 and 456.55 is: 684.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.33 : 1,074.72 = 456.55 : x
  2. Step 2: Convert to fraction form
    716.33/1,074.72 = 456.55/x
  3. Step 3: Cross multiply
    716.33x = 1,074.72 × 456.55
  4. Step 4: Simplify right side
    716.33x = 490,663.42
  5. Step 5: Solve for x
    x = 490,663.42/716.33
  6. Step 6: Final answer
    x = 684.97

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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.