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Finding the Fourth Proportional to 716.12, 1,074.18 and 253.91

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Solution

The fourth proportional to 716.12, 1,074.18 and 253.91 is: 380.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.12 : 1,074.18 = 253.91 : x
  2. Step 2: Convert to fraction form
    716.12/1,074.18 = 253.91/x
  3. Step 3: Cross multiply
    716.12x = 1,074.18 × 253.91
  4. Step 4: Simplify right side
    716.12x = 272,745.04
  5. Step 5: Solve for x
    x = 272,745.04/716.12
  6. Step 6: Final answer
    x = 380.87

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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.