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Finding the Fourth Proportional to 742.79, 1,113.43 and 377.38

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Solution

The fourth proportional to 742.79, 1,113.43 and 377.38 is: 565.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.79 : 1,113.43 = 377.38 : x
  2. Step 2: Convert to fraction form
    742.79/1,113.43 = 377.38/x
  3. Step 3: Cross multiply
    742.79x = 1,113.43 × 377.38
  4. Step 4: Simplify right side
    742.79x = 420,184.33
  5. Step 5: Solve for x
    x = 420,184.33/742.79
  6. Step 6: Final answer
    x = 565.68

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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.