Home / 1,969.22-2,717.78-1,129.76

Finding the Fourth Proportional to 1,969.22, 2,717.78 and 1,129.76

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Solution

The fourth proportional to 1,969.22, 2,717.78 and 1,129.76 is: 1,559.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.22 : 2,717.78 = 1,129.76 : x
  2. Step 2: Convert to fraction form
    1,969.22/2,717.78 = 1,129.76/x
  3. Step 3: Cross multiply
    1,969.22x = 2,717.78 × 1,129.76
  4. Step 4: Simplify right side
    1,969.22x = 3,070,439.13
  5. Step 5: Solve for x
    x = 3,070,439.13/1,969.22
  6. Step 6: Final answer
    x = 1,559.22

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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.