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Finding the Fourth Proportional to 716.32, 1,074.48 and 326.28

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Solution

The fourth proportional to 716.32, 1,074.48 and 326.28 is: 489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.32 : 1,074.48 = 326.28 : x
  2. Step 2: Convert to fraction form
    716.32/1,074.48 = 326.28/x
  3. Step 3: Cross multiply
    716.32x = 1,074.48 × 326.28
  4. Step 4: Simplify right side
    716.32x = 350,581.33
  5. Step 5: Solve for x
    x = 350,581.33/716.32
  6. Step 6: Final answer
    x = 489.42

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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.