Home / 2,171.28-3,256.68-939.84

Finding the Fourth Proportional to 2,171.28, 3,256.68 and 939.84

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Solution

The fourth proportional to 2,171.28, 3,256.68 and 939.84 is: 1,409.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.28 : 3,256.68 = 939.84 : x
  2. Step 2: Convert to fraction form
    2,171.28/3,256.68 = 939.84/x
  3. Step 3: Cross multiply
    2,171.28x = 3,256.68 × 939.84
  4. Step 4: Simplify right side
    2,171.28x = 3,060,758.13
  5. Step 5: Solve for x
    x = 3,060,758.13/2,171.28
  6. Step 6: Final answer
    x = 1,409.66

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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.