Home / 2,678.20-3,697.97-2,087.71

Finding the Fourth Proportional to 2,678.20, 3,697.97 and 2,087.71

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Solution

The fourth proportional to 2,678.20, 3,697.97 and 2,087.71 is: 2,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.20 : 3,697.97 = 2,087.71 : x
  2. Step 2: Convert to fraction form
    2,678.20/3,697.97 = 2,087.71/x
  3. Step 3: Cross multiply
    2,678.20x = 3,697.97 × 2,087.71
  4. Step 4: Simplify right side
    2,678.20x = 7,720,269.27
  5. Step 5: Solve for x
    x = 7,720,269.27/2,678.20
  6. Step 6: Final answer
    x = 2,882.64

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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.