Home / 2,218.86-3,063.45-1,380.70

Finding the Fourth Proportional to 2,218.86, 3,063.45 and 1,380.70

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Solution

The fourth proportional to 2,218.86, 3,063.45 and 1,380.70 is: 1,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.86 : 3,063.45 = 1,380.70 : x
  2. Step 2: Convert to fraction form
    2,218.86/3,063.45 = 1,380.70/x
  3. Step 3: Cross multiply
    2,218.86x = 3,063.45 × 1,380.70
  4. Step 4: Simplify right side
    2,218.86x = 4,229,705.42
  5. Step 5: Solve for x
    x = 4,229,705.42/2,218.86
  6. Step 6: Final answer
    x = 1,906.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.