Home / 1,115.05-1,538.77-610.91

Finding the Fourth Proportional to 1,115.05, 1,538.77 and 610.91

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Solution

The fourth proportional to 1,115.05, 1,538.77 and 610.91 is: 843.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.05 : 1,538.77 = 610.91 : x
  2. Step 2: Convert to fraction form
    1,115.05/1,538.77 = 610.91/x
  3. Step 3: Cross multiply
    1,115.05x = 1,538.77 × 610.91
  4. Step 4: Simplify right side
    1,115.05x = 940,049.98
  5. Step 5: Solve for x
    x = 940,049.98/1,115.05
  6. Step 6: Final answer
    x = 843.06

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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.