Home / 2,886.40-4,322.88-2,115.20

Finding the Fourth Proportional to 2,886.40, 4,322.88 and 2,115.20

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Solution

The fourth proportional to 2,886.40, 4,322.88 and 2,115.20 is: 3,167.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.40 : 4,322.88 = 2,115.20 : x
  2. Step 2: Convert to fraction form
    2,886.40/4,322.88 = 2,115.20/x
  3. Step 3: Cross multiply
    2,886.40x = 4,322.88 × 2,115.20
  4. Step 4: Simplify right side
    2,886.40x = 9,143,755.78
  5. Step 5: Solve for x
    x = 9,143,755.78/2,886.40
  6. Step 6: Final answer
    x = 3,167.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.