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Finding the Fourth Proportional to 2,781.20, 4,169.04 and 1,549.20

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Solution

The fourth proportional to 2,781.20, 4,169.04 and 1,549.20 is: 2,322.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.20 : 4,169.04 = 1,549.20 : x
  2. Step 2: Convert to fraction form
    2,781.20/4,169.04 = 1,549.20/x
  3. Step 3: Cross multiply
    2,781.20x = 4,169.04 × 1,549.20
  4. Step 4: Simplify right side
    2,781.20x = 6,458,676.77
  5. Step 5: Solve for x
    x = 6,458,676.77/2,781.20
  6. Step 6: Final answer
    x = 2,322.26

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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.