Home / 2,167.38-2,990.21-1,327.78

Finding the Fourth Proportional to 2,167.38, 2,990.21 and 1,327.78

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Solution

The fourth proportional to 2,167.38, 2,990.21 and 1,327.78 is: 1,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.38 : 2,990.21 = 1,327.78 : x
  2. Step 2: Convert to fraction form
    2,167.38/2,990.21 = 1,327.78/x
  3. Step 3: Cross multiply
    2,167.38x = 2,990.21 × 1,327.78
  4. Step 4: Simplify right side
    2,167.38x = 3,970,341.03
  5. Step 5: Solve for x
    x = 3,970,341.03/2,167.38
  6. Step 6: Final answer
    x = 1,831.86

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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.