Home / 2,115.11-2,918.82-1,170.88

Finding the Fourth Proportional to 2,115.11, 2,918.82 and 1,170.88

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Solution

The fourth proportional to 2,115.11, 2,918.82 and 1,170.88 is: 1,615.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.11 : 2,918.82 = 1,170.88 : x
  2. Step 2: Convert to fraction form
    2,115.11/2,918.82 = 1,170.88/x
  3. Step 3: Cross multiply
    2,115.11x = 2,918.82 × 1,170.88
  4. Step 4: Simplify right side
    2,115.11x = 3,417,584.21
  5. Step 5: Solve for x
    x = 3,417,584.21/2,115.11
  6. Step 6: Final answer
    x = 1,615.80

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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.