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Finding the Fourth Proportional to 2,638.80, 3,958.44 and 907.44

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Solution

The fourth proportional to 2,638.80, 3,958.44 and 907.44 is: 1,361.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.80 : 3,958.44 = 907.44 : x
  2. Step 2: Convert to fraction form
    2,638.80/3,958.44 = 907.44/x
  3. Step 3: Cross multiply
    2,638.80x = 3,958.44 × 907.44
  4. Step 4: Simplify right side
    2,638.80x = 3,592,046.79
  5. Step 5: Solve for x
    x = 3,592,046.79/2,638.80
  6. Step 6: Final answer
    x = 1,361.24

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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.