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Finding the Fourth Proportional to 742.46, 1,111.61 and 375.44

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Solution

The fourth proportional to 742.46, 1,111.61 and 375.44 is: 562.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.46 : 1,111.61 = 375.44 : x
  2. Step 2: Convert to fraction form
    742.46/1,111.61 = 375.44/x
  3. Step 3: Cross multiply
    742.46x = 1,111.61 × 375.44
  4. Step 4: Simplify right side
    742.46x = 417,346.58
  5. Step 5: Solve for x
    x = 417,346.58/742.46
  6. Step 6: Final answer
    x = 562.12

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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.