Home / 1,251.68-1,879.07-1,187.10

Finding the Fourth Proportional to 1,251.68, 1,879.07 and 1,187.10

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Solution

The fourth proportional to 1,251.68, 1,879.07 and 1,187.10 is: 1,782.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,251.68 : 1,879.07 = 1,187.10 : x
  2. Step 2: Convert to fraction form
    1,251.68/1,879.07 = 1,187.10/x
  3. Step 3: Cross multiply
    1,251.68x = 1,879.07 × 1,187.10
  4. Step 4: Simplify right side
    1,251.68x = 2,230,648.69
  5. Step 5: Solve for x
    x = 2,230,648.69/1,251.68
  6. Step 6: Final answer
    x = 1,782.12

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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.