Home / 2,939.28-4,397.40-2,119.12

Finding the Fourth Proportional to 2,939.28, 4,397.40 and 2,119.12

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Solution

The fourth proportional to 2,939.28, 4,397.40 and 2,119.12 is: 3,170.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.28 : 4,397.40 = 2,119.12 : x
  2. Step 2: Convert to fraction form
    2,939.28/4,397.40 = 2,119.12/x
  3. Step 3: Cross multiply
    2,939.28x = 4,397.40 × 2,119.12
  4. Step 4: Simplify right side
    2,939.28x = 9,318,618.29
  5. Step 5: Solve for x
    x = 9,318,618.29/2,939.28
  6. Step 6: Final answer
    x = 3,170.37

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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.