Home / 3,125.38-4,689.76-1,277.78

Finding the Fourth Proportional to 3,125.38, 4,689.76 and 1,277.78

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Solution

The fourth proportional to 3,125.38, 4,689.76 and 1,277.78 is: 1,917.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.38 : 4,689.76 = 1,277.78 : x
  2. Step 2: Convert to fraction form
    3,125.38/4,689.76 = 1,277.78/x
  3. Step 3: Cross multiply
    3,125.38x = 4,689.76 × 1,277.78
  4. Step 4: Simplify right side
    3,125.38x = 5,992,481.53
  5. Step 5: Solve for x
    x = 5,992,481.53/3,125.38
  6. Step 6: Final answer
    x = 1,917.36

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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.