Home / 3,871.95-5,343.39-2,278.71

Finding the Fourth Proportional to 3,871.95, 5,343.39 and 2,278.71

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Solution

The fourth proportional to 3,871.95, 5,343.39 and 2,278.71 is: 3,144.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.95 : 5,343.39 = 2,278.71 : x
  2. Step 2: Convert to fraction form
    3,871.95/5,343.39 = 2,278.71/x
  3. Step 3: Cross multiply
    3,871.95x = 5,343.39 × 2,278.71
  4. Step 4: Simplify right side
    3,871.95x = 12,176,036.23
  5. Step 5: Solve for x
    x = 12,176,036.23/3,871.95
  6. Step 6: Final answer
    x = 3,144.68

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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.