Home / 1,443.12-2,161.26-827.16

Finding the Fourth Proportional to 1,443.12, 2,161.26 and 827.16

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Solution

The fourth proportional to 1,443.12, 2,161.26 and 827.16 is: 1,238.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443.12 : 2,161.26 = 827.16 : x
  2. Step 2: Convert to fraction form
    1,443.12/2,161.26 = 827.16/x
  3. Step 3: Cross multiply
    1,443.12x = 2,161.26 × 827.16
  4. Step 4: Simplify right side
    1,443.12x = 1,787,707.82
  5. Step 5: Solve for x
    x = 1,787,707.82/1,443.12
  6. Step 6: Final answer
    x = 1,238.78

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1.5x scale

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.