Home / 2,820.20-4,231.49-1,520.15

Finding the Fourth Proportional to 2,820.20, 4,231.49 and 1,520.15

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Solution

The fourth proportional to 2,820.20, 4,231.49 and 1,520.15 is: 2,280.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.20 : 4,231.49 = 1,520.15 : x
  2. Step 2: Convert to fraction form
    2,820.20/4,231.49 = 1,520.15/x
  3. Step 3: Cross multiply
    2,820.20x = 4,231.49 × 1,520.15
  4. Step 4: Simplify right side
    2,820.20x = 6,432,470.77
  5. Step 5: Solve for x
    x = 6,432,470.77/2,820.20
  6. Step 6: Final answer
    x = 2,280.86

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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.