Home / 3,178.20-4,740.27-2,687.70

Finding the Fourth Proportional to 3,178.20, 4,740.27 and 2,687.70

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Solution

The fourth proportional to 3,178.20, 4,740.27 and 2,687.70 is: 4,008.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.20 : 4,740.27 = 2,687.70 : x
  2. Step 2: Convert to fraction form
    3,178.20/4,740.27 = 2,687.70/x
  3. Step 3: Cross multiply
    3,178.20x = 4,740.27 × 2,687.70
  4. Step 4: Simplify right side
    3,178.20x = 12,740,423.68
  5. Step 5: Solve for x
    x = 12,740,423.68/3,178.20
  6. Step 6: Final answer
    x = 4,008.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.