Home / 2,218.85-3,063.45-1,380.47

Finding the Fourth Proportional to 2,218.85, 3,063.45 and 1,380.47

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Solution

The fourth proportional to 2,218.85, 3,063.45 and 1,380.47 is: 1,905.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.85 : 3,063.45 = 1,380.47 : x
  2. Step 2: Convert to fraction form
    2,218.85/3,063.45 = 1,380.47/x
  3. Step 3: Cross multiply
    2,218.85x = 3,063.45 × 1,380.47
  4. Step 4: Simplify right side
    2,218.85x = 4,229,000.82
  5. Step 5: Solve for x
    x = 4,229,000.82/2,218.85
  6. Step 6: Final answer
    x = 1,905.94

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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.