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Finding the Fourth Proportional to 2,241.64, 3,361.39 and 780.61

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Solution

The fourth proportional to 2,241.64, 3,361.39 and 780.61 is: 1,170.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,241.64 : 3,361.39 = 780.61 : x
  2. Step 2: Convert to fraction form
    2,241.64/3,361.39 = 780.61/x
  3. Step 3: Cross multiply
    2,241.64x = 3,361.39 × 780.61
  4. Step 4: Simplify right side
    2,241.64x = 2,623,934.65
  5. Step 5: Solve for x
    x = 2,623,934.65/2,241.64
  6. Step 6: Final answer
    x = 1,170.54

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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.