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Finding the Fourth Proportional to 741.42, 1,023.15 and 409.86

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Solution

The fourth proportional to 741.42, 1,023.15 and 409.86 is: 565.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.42 : 1,023.15 = 409.86 : x
  2. Step 2: Convert to fraction form
    741.42/1,023.15 = 409.86/x
  3. Step 3: Cross multiply
    741.42x = 1,023.15 × 409.86
  4. Step 4: Simplify right side
    741.42x = 419,348.26
  5. Step 5: Solve for x
    x = 419,348.26/741.42
  6. Step 6: Final answer
    x = 565.60

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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.