Home / 1,971.27-2,720.49-1,087.11

Finding the Fourth Proportional to 1,971.27, 2,720.49 and 1,087.11

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Solution

The fourth proportional to 1,971.27, 2,720.49 and 1,087.11 is: 1,500.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.27 : 2,720.49 = 1,087.11 : x
  2. Step 2: Convert to fraction form
    1,971.27/2,720.49 = 1,087.11/x
  3. Step 3: Cross multiply
    1,971.27x = 2,720.49 × 1,087.11
  4. Step 4: Simplify right side
    1,971.27x = 2,957,471.88
  5. Step 5: Solve for x
    x = 2,957,471.88/1,971.27
  6. Step 6: Final answer
    x = 1,500.29

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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.