Home / 3,970.28-5,479.08-2,398.88

Finding the Fourth Proportional to 3,970.28, 5,479.08 and 2,398.88

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Solution

The fourth proportional to 3,970.28, 5,479.08 and 2,398.88 is: 3,310.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.28 : 5,479.08 = 2,398.88 : x
  2. Step 2: Convert to fraction form
    3,970.28/5,479.08 = 2,398.88/x
  3. Step 3: Cross multiply
    3,970.28x = 5,479.08 × 2,398.88
  4. Step 4: Simplify right side
    3,970.28x = 13,143,655.43
  5. Step 5: Solve for x
    x = 13,143,655.43/3,970.28
  6. Step 6: Final answer
    x = 3,310.51

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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.