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Finding the Fourth Proportional to 1,372.43, 2,058.20 and 447.75

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Solution

The fourth proportional to 1,372.43, 2,058.20 and 447.75 is: 671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.43 : 2,058.20 = 447.75 : x
  2. Step 2: Convert to fraction form
    1,372.43/2,058.20 = 447.75/x
  3. Step 3: Cross multiply
    1,372.43x = 2,058.20 × 447.75
  4. Step 4: Simplify right side
    1,372.43x = 921,559.05
  5. Step 5: Solve for x
    x = 921,559.05/1,372.43
  6. Step 6: Final answer
    x = 671.48

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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.