Home / 2,815.20-4,221.12-1,169.76

Finding the Fourth Proportional to 2,815.20, 4,221.12 and 1,169.76

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Solution

The fourth proportional to 2,815.20, 4,221.12 and 1,169.76 is: 1,753.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.20 : 4,221.12 = 1,169.76 : x
  2. Step 2: Convert to fraction form
    2,815.20/4,221.12 = 1,169.76/x
  3. Step 3: Cross multiply
    2,815.20x = 4,221.12 × 1,169.76
  4. Step 4: Simplify right side
    2,815.20x = 4,937,697.33
  5. Step 5: Solve for x
    x = 4,937,697.33/2,815.20
  6. Step 6: Final answer
    x = 1,753.94

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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.