Home / 3,179.40-4,387.33-1,781.88

Finding the Fourth Proportional to 3,179.40, 4,387.33 and 1,781.88

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Solution

The fourth proportional to 3,179.40, 4,387.33 and 1,781.88 is: 2,458.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.40 : 4,387.33 = 1,781.88 : x
  2. Step 2: Convert to fraction form
    3,179.40/4,387.33 = 1,781.88/x
  3. Step 3: Cross multiply
    3,179.40x = 4,387.33 × 1,781.88
  4. Step 4: Simplify right side
    3,179.40x = 7,817,669.19
  5. Step 5: Solve for x
    x = 7,817,669.19/3,179.40
  6. Step 6: Final answer
    x = 2,458.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.