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Finding the Fourth Proportional to 716.28, 1,074.72 and 305.46

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Solution

The fourth proportional to 716.28, 1,074.72 and 305.46 is: 458.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.28 : 1,074.72 = 305.46 : x
  2. Step 2: Convert to fraction form
    716.28/1,074.72 = 305.46/x
  3. Step 3: Cross multiply
    716.28x = 1,074.72 × 305.46
  4. Step 4: Simplify right side
    716.28x = 328,283.97
  5. Step 5: Solve for x
    x = 328,283.97/716.28
  6. Step 6: Final answer
    x = 458.32

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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.