Home / 2,680.80-4,019.28-1,381.44

Finding the Fourth Proportional to 2,680.80, 4,019.28 and 1,381.44

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Solution

The fourth proportional to 2,680.80, 4,019.28 and 1,381.44 is: 2,071.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.80 : 4,019.28 = 1,381.44 : x
  2. Step 2: Convert to fraction form
    2,680.80/4,019.28 = 1,381.44/x
  3. Step 3: Cross multiply
    2,680.80x = 4,019.28 × 1,381.44
  4. Step 4: Simplify right side
    2,680.80x = 5,552,394.16
  5. Step 5: Solve for x
    x = 5,552,394.16/2,680.80
  6. Step 6: Final answer
    x = 2,071.17

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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.