Home / 2,815.20-4,231.92-2,612.30

Finding the Fourth Proportional to 2,815.20, 4,231.92 and 2,612.30

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Solution

The fourth proportional to 2,815.20, 4,231.92 and 2,612.30 is: 3,926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.20 : 4,231.92 = 2,612.30 : x
  2. Step 2: Convert to fraction form
    2,815.20/4,231.92 = 2,612.30/x
  3. Step 3: Cross multiply
    2,815.20x = 4,231.92 × 2,612.30
  4. Step 4: Simplify right side
    2,815.20x = 11,055,044.62
  5. Step 5: Solve for x
    x = 11,055,044.62/2,815.20
  6. Step 6: Final answer
    x = 3,926.91

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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.