Home / 3,115.68-4,301.28-2,278.32

Finding the Fourth Proportional to 3,115.68, 4,301.28 and 2,278.32

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Solution

The fourth proportional to 3,115.68, 4,301.28 and 2,278.32 is: 3,145.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.68 : 4,301.28 = 2,278.32 : x
  2. Step 2: Convert to fraction form
    3,115.68/4,301.28 = 2,278.32/x
  3. Step 3: Cross multiply
    3,115.68x = 4,301.28 × 2,278.32
  4. Step 4: Simplify right side
    3,115.68x = 9,799,692.25
  5. Step 5: Solve for x
    x = 9,799,692.25/3,115.68
  6. Step 6: Final answer
    x = 3,145.28

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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.