Home / 2,781.20-4,177.84-1,686.08

Finding the Fourth Proportional to 2,781.20, 4,177.84 and 1,686.08

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Solution

The fourth proportional to 2,781.20, 4,177.84 and 1,686.08 is: 2,532.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.20 : 4,177.84 = 1,686.08 : x
  2. Step 2: Convert to fraction form
    2,781.20/4,177.84 = 1,686.08/x
  3. Step 3: Cross multiply
    2,781.20x = 4,177.84 × 1,686.08
  4. Step 4: Simplify right side
    2,781.20x = 7,044,172.47
  5. Step 5: Solve for x
    x = 7,044,172.47/2,781.20
  6. Step 6: Final answer
    x = 2,532.78

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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.