Home / 3,127.68-4,691.16-819.36

Finding the Fourth Proportional to 3,127.68, 4,691.16 and 819.36

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Solution

The fourth proportional to 3,127.68, 4,691.16 and 819.36 is: 1,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.68 : 4,691.16 = 819.36 : x
  2. Step 2: Convert to fraction form
    3,127.68/4,691.16 = 819.36/x
  3. Step 3: Cross multiply
    3,127.68x = 4,691.16 × 819.36
  4. Step 4: Simplify right side
    3,127.68x = 3,843,748.86
  5. Step 5: Solve for x
    x = 3,843,748.86/3,127.68
  6. Step 6: Final answer
    x = 1,228.95

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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.