Home / 3,079.28-4,618.80-999.20

Finding the Fourth Proportional to 3,079.28, 4,618.80 and 999.20

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Solution

The fourth proportional to 3,079.28, 4,618.80 and 999.20 is: 1,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,079.28 : 4,618.80 = 999.20 : x
  2. Step 2: Convert to fraction form
    3,079.28/4,618.80 = 999.20/x
  3. Step 3: Cross multiply
    3,079.28x = 4,618.80 × 999.20
  4. Step 4: Simplify right side
    3,079.28x = 4,615,104.96
  5. Step 5: Solve for x
    x = 4,615,104.96/3,079.28
  6. Step 6: Final answer
    x = 1,498.76

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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.