Home / 3,871.90-5,343.35-2,380.32

Finding the Fourth Proportional to 3,871.90, 5,343.35 and 2,380.32

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Solution

The fourth proportional to 3,871.90, 5,343.35 and 2,380.32 is: 3,284.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.90 : 5,343.35 = 2,380.32 : x
  2. Step 2: Convert to fraction form
    3,871.90/5,343.35 = 2,380.32/x
  3. Step 3: Cross multiply
    3,871.90x = 5,343.35 × 2,380.32
  4. Step 4: Simplify right side
    3,871.90x = 12,718,856.16
  5. Step 5: Solve for x
    x = 12,718,856.16/3,871.90
  6. Step 6: Final answer
    x = 3,284.92

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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.