Home / 3,119.92-4,680.40-1,388.48

Finding the Fourth Proportional to 3,119.92, 4,680.40 and 1,388.48

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Solution

The fourth proportional to 3,119.92, 4,680.40 and 1,388.48 is: 2,082.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.92 : 4,680.40 = 1,388.48 : x
  2. Step 2: Convert to fraction form
    3,119.92/4,680.40 = 1,388.48/x
  3. Step 3: Cross multiply
    3,119.92x = 4,680.40 × 1,388.48
  4. Step 4: Simplify right side
    3,119.92x = 6,498,641.79
  5. Step 5: Solve for x
    x = 6,498,641.79/3,119.92
  6. Step 6: Final answer
    x = 2,082.95

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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.