Home / 3,868.75-5,338.87-2,275.28

Finding the Fourth Proportional to 3,868.75, 5,338.87 and 2,275.28

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Solution

The fourth proportional to 3,868.75, 5,338.87 and 2,275.28 is: 3,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.75 : 5,338.87 = 2,275.28 : x
  2. Step 2: Convert to fraction form
    3,868.75/5,338.87 = 2,275.28/x
  3. Step 3: Cross multiply
    3,868.75x = 5,338.87 × 2,275.28
  4. Step 4: Simplify right side
    3,868.75x = 12,147,391.75
  5. Step 5: Solve for x
    x = 12,147,391.75/3,868.75
  6. Step 6: Final answer
    x = 3,139.88

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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.