Home / 2,177.40-3,268.56-879.78

Finding the Fourth Proportional to 2,177.40, 3,268.56 and 879.78

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Solution

The fourth proportional to 2,177.40, 3,268.56 and 879.78 is: 1,320.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.40 : 3,268.56 = 879.78 : x
  2. Step 2: Convert to fraction form
    2,177.40/3,268.56 = 879.78/x
  3. Step 3: Cross multiply
    2,177.40x = 3,268.56 × 879.78
  4. Step 4: Simplify right side
    2,177.40x = 2,875,613.72
  5. Step 5: Solve for x
    x = 2,875,613.72/2,177.40
  6. Step 6: Final answer
    x = 1,320.66

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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.