Home / 1,679.38-2,515.80-1,100.50

Finding the Fourth Proportional to 1,679.38, 2,515.80 and 1,100.50

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Solution

The fourth proportional to 1,679.38, 2,515.80 and 1,100.50 is: 1,648.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.38 : 2,515.80 = 1,100.50 : x
  2. Step 2: Convert to fraction form
    1,679.38/2,515.80 = 1,100.50/x
  3. Step 3: Cross multiply
    1,679.38x = 2,515.80 × 1,100.50
  4. Step 4: Simplify right side
    1,679.38x = 2,768,637.90
  5. Step 5: Solve for x
    x = 2,768,637.90/1,679.38
  6. Step 6: Final answer
    x = 1,648.61

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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.