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Finding the Fourth Proportional to 2,231.63, 3,347.82 and 770.44

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Solution

The fourth proportional to 2,231.63, 3,347.82 and 770.44 is: 1,155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.63 : 3,347.82 = 770.44 : x
  2. Step 2: Convert to fraction form
    2,231.63/3,347.82 = 770.44/x
  3. Step 3: Cross multiply
    2,231.63x = 3,347.82 × 770.44
  4. Step 4: Simplify right side
    2,231.63x = 2,579,273.85
  5. Step 5: Solve for x
    x = 2,579,273.85/2,231.63
  6. Step 6: Final answer
    x = 1,155.78

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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.