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Finding the Fourth Proportional to 2,672.80, 4,007.28 and 1,373.20

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Solution

The fourth proportional to 2,672.80, 4,007.28 and 1,373.20 is: 2,058.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.80 : 4,007.28 = 1,373.20 : x
  2. Step 2: Convert to fraction form
    2,672.80/4,007.28 = 1,373.20/x
  3. Step 3: Cross multiply
    2,672.80x = 4,007.28 × 1,373.20
  4. Step 4: Simplify right side
    2,672.80x = 5,502,796.90
  5. Step 5: Solve for x
    x = 5,502,796.90/2,672.80
  6. Step 6: Final answer
    x = 2,058.81

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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.