Home / 1,447.16-2,169.92-985.56

Finding the Fourth Proportional to 1,447.16, 2,169.92 and 985.56

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Solution

The fourth proportional to 1,447.16, 2,169.92 and 985.56 is: 1,477.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.16 : 2,169.92 = 985.56 : x
  2. Step 2: Convert to fraction form
    1,447.16/2,169.92 = 985.56/x
  3. Step 3: Cross multiply
    1,447.16x = 2,169.92 × 985.56
  4. Step 4: Simplify right side
    1,447.16x = 2,138,586.36
  5. Step 5: Solve for x
    x = 2,138,586.36/1,447.16
  6. Step 6: Final answer
    x = 1,477.78

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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.