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Finding the Fourth Proportional to 741.38, 1,023.11 and 409.80

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Solution

The fourth proportional to 741.38, 1,023.11 and 409.80 is: 565.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.38 : 1,023.11 = 409.80 : x
  2. Step 2: Convert to fraction form
    741.38/1,023.11 = 409.80/x
  3. Step 3: Cross multiply
    741.38x = 1,023.11 × 409.80
  4. Step 4: Simplify right side
    741.38x = 419,276.11
  5. Step 5: Solve for x
    x = 419,276.11/741.38
  6. Step 6: Final answer
    x = 565.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.