Home / 3,487.20-5,230.80-2,879.70

Finding the Fourth Proportional to 3,487.20, 5,230.80 and 2,879.70

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Solution

The fourth proportional to 3,487.20, 5,230.80 and 2,879.70 is: 4,319.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.20 : 5,230.80 = 2,879.70 : x
  2. Step 2: Convert to fraction form
    3,487.20/5,230.80 = 2,879.70/x
  3. Step 3: Cross multiply
    3,487.20x = 5,230.80 × 2,879.70
  4. Step 4: Simplify right side
    3,487.20x = 15,063,134.76
  5. Step 5: Solve for x
    x = 15,063,134.76/3,487.20
  6. Step 6: Final answer
    x = 4,319.55

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Similar ratio
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1.5x scale

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.