Home / 3,079.40-4,238.88-2,685.76

Finding the Fourth Proportional to 3,079.40, 4,238.88 and 2,685.76

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Solution

The fourth proportional to 3,079.40, 4,238.88 and 2,685.76 is: 3,697.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,079.40 : 4,238.88 = 2,685.76 : x
  2. Step 2: Convert to fraction form
    3,079.40/4,238.88 = 2,685.76/x
  3. Step 3: Cross multiply
    3,079.40x = 4,238.88 × 2,685.76
  4. Step 4: Simplify right side
    3,079.40x = 11,384,614.35
  5. Step 5: Solve for x
    x = 11,384,614.35/3,079.40
  6. Step 6: Final answer
    x = 3,697.02

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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.