Home / 1,991.11-2,988.18-1,004.91

Finding the Fourth Proportional to 1,991.11, 2,988.18 and 1,004.91

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Solution

The fourth proportional to 1,991.11, 2,988.18 and 1,004.91 is: 1,508.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.11 : 2,988.18 = 1,004.91 : x
  2. Step 2: Convert to fraction form
    1,991.11/2,988.18 = 1,004.91/x
  3. Step 3: Cross multiply
    1,991.11x = 2,988.18 × 1,004.91
  4. Step 4: Simplify right side
    1,991.11x = 3,002,851.96
  5. Step 5: Solve for x
    x = 3,002,851.96/1,991.11
  6. Step 6: Final answer
    x = 1,508.13

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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.