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Finding the Fourth Proportional to 742.73, 1,113.74 and 395.97

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Solution

The fourth proportional to 742.73, 1,113.74 and 395.97 is: 593.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.73 : 1,113.74 = 395.97 : x
  2. Step 2: Convert to fraction form
    742.73/1,113.74 = 395.97/x
  3. Step 3: Cross multiply
    742.73x = 1,113.74 × 395.97
  4. Step 4: Simplify right side
    742.73x = 441,005.65
  5. Step 5: Solve for x
    x = 441,005.65/742.73
  6. Step 6: Final answer
    x = 593.77

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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.