Home / 3,871.14-5,340.78-2,299.20

Finding the Fourth Proportional to 3,871.14, 5,340.78 and 2,299.20

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Solution

The fourth proportional to 3,871.14, 5,340.78 and 2,299.20 is: 3,172.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.14 : 5,340.78 = 2,299.20 : x
  2. Step 2: Convert to fraction form
    3,871.14/5,340.78 = 2,299.20/x
  3. Step 3: Cross multiply
    3,871.14x = 5,340.78 × 2,299.20
  4. Step 4: Simplify right side
    3,871.14x = 12,279,521.38
  5. Step 5: Solve for x
    x = 12,279,521.38/3,871.14
  6. Step 6: Final answer
    x = 3,172.07

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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.