Home / 2,758.90-4,139.64-1,372.18

Finding the Fourth Proportional to 2,758.90, 4,139.64 and 1,372.18

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Solution

The fourth proportional to 2,758.90, 4,139.64 and 1,372.18 is: 2,058.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.90 : 4,139.64 = 1,372.18 : x
  2. Step 2: Convert to fraction form
    2,758.90/4,139.64 = 1,372.18/x
  3. Step 3: Cross multiply
    2,758.90x = 4,139.64 × 1,372.18
  4. Step 4: Simplify right side
    2,758.90x = 5,680,331.22
  5. Step 5: Solve for x
    x = 5,680,331.22/2,758.90
  6. Step 6: Final answer
    x = 2,058.91

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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.