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Finding the Fourth Proportional to 1,372.90, 2,059.52 and 448.55

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Solution

The fourth proportional to 1,372.90, 2,059.52 and 448.55 is: 672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.90 : 2,059.52 = 448.55 : x
  2. Step 2: Convert to fraction form
    1,372.90/2,059.52 = 448.55/x
  3. Step 3: Cross multiply
    1,372.90x = 2,059.52 × 448.55
  4. Step 4: Simplify right side
    1,372.90x = 923,797.70
  5. Step 5: Solve for x
    x = 923,797.70/1,372.90
  6. Step 6: Final answer
    x = 672.88

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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.