Home / 2,687.04-4,028.40-1,388.88

Finding the Fourth Proportional to 2,687.04, 4,028.40 and 1,388.88

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Solution

The fourth proportional to 2,687.04, 4,028.40 and 1,388.88 is: 2,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.04 : 4,028.40 = 1,388.88 : x
  2. Step 2: Convert to fraction form
    2,687.04/4,028.40 = 1,388.88/x
  3. Step 3: Cross multiply
    2,687.04x = 4,028.40 × 1,388.88
  4. Step 4: Simplify right side
    2,687.04x = 5,594,964.19
  5. Step 5: Solve for x
    x = 5,594,964.19/2,687.04
  6. Step 6: Final answer
    x = 2,082.20

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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.