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Finding the Fourth Proportional to 742.42, 1,113.25 and 248.65

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Solution

The fourth proportional to 742.42, 1,113.25 and 248.65 is: 372.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.42 : 1,113.25 = 248.65 : x
  2. Step 2: Convert to fraction form
    742.42/1,113.25 = 248.65/x
  3. Step 3: Cross multiply
    742.42x = 1,113.25 × 248.65
  4. Step 4: Simplify right side
    742.42x = 276,812.94
  5. Step 5: Solve for x
    x = 276,812.94/742.42
  6. Step 6: Final answer
    x = 372.85

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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.