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Finding the Fourth Proportional to 742.56, 1,114.41 and 331.95

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Solution

The fourth proportional to 742.56, 1,114.41 and 331.95 is: 498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.56 : 1,114.41 = 331.95 : x
  2. Step 2: Convert to fraction form
    742.56/1,114.41 = 331.95/x
  3. Step 3: Cross multiply
    742.56x = 1,114.41 × 331.95
  4. Step 4: Simplify right side
    742.56x = 369,928.40
  5. Step 5: Solve for x
    x = 369,928.40/742.56
  6. Step 6: Final answer
    x = 498.18

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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.