Home / 2,171.92-2,997.27-1,287.55

Finding the Fourth Proportional to 2,171.92, 2,997.27 and 1,287.55

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Solution

The fourth proportional to 2,171.92, 2,997.27 and 1,287.55 is: 1,776.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.92 : 2,997.27 = 1,287.55 : x
  2. Step 2: Convert to fraction form
    2,171.92/2,997.27 = 1,287.55/x
  3. Step 3: Cross multiply
    2,171.92x = 2,997.27 × 1,287.55
  4. Step 4: Simplify right side
    2,171.92x = 3,859,134.99
  5. Step 5: Solve for x
    x = 3,859,134.99/2,171.92
  6. Step 6: Final answer
    x = 1,776.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.