Home / 1,960.38-2,704.28-1,587.78

Finding the Fourth Proportional to 1,960.38, 2,704.28 and 1,587.78

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Solution

The fourth proportional to 1,960.38, 2,704.28 and 1,587.78 is: 2,190.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,960.38 : 2,704.28 = 1,587.78 : x
  2. Step 2: Convert to fraction form
    1,960.38/2,704.28 = 1,587.78/x
  3. Step 3: Cross multiply
    1,960.38x = 2,704.28 × 1,587.78
  4. Step 4: Simplify right side
    1,960.38x = 4,293,801.70
  5. Step 5: Solve for x
    x = 4,293,801.70/1,960.38
  6. Step 6: Final answer
    x = 2,190.29

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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.