Home / 3,127.75-4,691.67-819.25

Finding the Fourth Proportional to 3,127.75, 4,691.67 and 819.25

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Solution

The fourth proportional to 3,127.75, 4,691.67 and 819.25 is: 1,228.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.75 : 4,691.67 = 819.25 : x
  2. Step 2: Convert to fraction form
    3,127.75/4,691.67 = 819.25/x
  3. Step 3: Cross multiply
    3,127.75x = 4,691.67 × 819.25
  4. Step 4: Simplify right side
    3,127.75x = 3,843,650.65
  5. Step 5: Solve for x
    x = 3,843,650.65/3,127.75
  6. Step 6: Final answer
    x = 1,228.89

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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.