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Finding the Fourth Proportional to 2,267.90, 3,401.82 and 728.90

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Solution

The fourth proportional to 2,267.90, 3,401.82 and 728.90 is: 1,093.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,267.90 : 3,401.82 = 728.90 : x
  2. Step 2: Convert to fraction form
    2,267.90/3,401.82 = 728.90/x
  3. Step 3: Cross multiply
    2,267.90x = 3,401.82 × 728.90
  4. Step 4: Simplify right side
    2,267.90x = 2,479,586.60
  5. Step 5: Solve for x
    x = 2,479,586.60/2,267.90
  6. Step 6: Final answer
    x = 1,093.34

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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.