Home / 2,147.81-3,221.72-849.28

Finding the Fourth Proportional to 2,147.81, 3,221.72 and 849.28

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Solution

The fourth proportional to 2,147.81, 3,221.72 and 849.28 is: 1,273.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,147.81 : 3,221.72 = 849.28 : x
  2. Step 2: Convert to fraction form
    2,147.81/3,221.72 = 849.28/x
  3. Step 3: Cross multiply
    2,147.81x = 3,221.72 × 849.28
  4. Step 4: Simplify right side
    2,147.81x = 2,736,142.36
  5. Step 5: Solve for x
    x = 2,736,142.36/2,147.81
  6. Step 6: Final answer
    x = 1,273.92

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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.