Home / 2,218.56-3,327.48-831.78

Finding the Fourth Proportional to 2,218.56, 3,327.48 and 831.78

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Solution

The fourth proportional to 2,218.56, 3,327.48 and 831.78 is: 1,247.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.56 : 3,327.48 = 831.78 : x
  2. Step 2: Convert to fraction form
    2,218.56/3,327.48 = 831.78/x
  3. Step 3: Cross multiply
    2,218.56x = 3,327.48 × 831.78
  4. Step 4: Simplify right side
    2,218.56x = 2,767,731.31
  5. Step 5: Solve for x
    x = 2,767,731.31/2,218.56
  6. Step 6: Final answer
    x = 1,247.54

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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.