Home / 1,945.28-2,917.92-1,297.28

Finding the Fourth Proportional to 1,945.28, 2,917.92 and 1,297.28

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Solution

The fourth proportional to 1,945.28, 2,917.92 and 1,297.28 is: 1,945.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.28 : 2,917.92 = 1,297.28 : x
  2. Step 2: Convert to fraction form
    1,945.28/2,917.92 = 1,297.28/x
  3. Step 3: Cross multiply
    1,945.28x = 2,917.92 × 1,297.28
  4. Step 4: Simplify right side
    1,945.28x = 3,785,359.26
  5. Step 5: Solve for x
    x = 3,785,359.26/1,945.28
  6. Step 6: Final answer
    x = 1,945.92

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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.