Home / 2,115.80-2,919.75-1,232.09

Finding the Fourth Proportional to 2,115.80, 2,919.75 and 1,232.09

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Solution

The fourth proportional to 2,115.80, 2,919.75 and 1,232.09 is: 1,700.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.80 : 2,919.75 = 1,232.09 : x
  2. Step 2: Convert to fraction form
    2,115.80/2,919.75 = 1,232.09/x
  3. Step 3: Cross multiply
    2,115.80x = 2,919.75 × 1,232.09
  4. Step 4: Simplify right side
    2,115.80x = 3,597,394.78
  5. Step 5: Solve for x
    x = 3,597,394.78/2,115.80
  6. Step 6: Final answer
    x = 1,700.25

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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.