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Finding the Fourth Proportional to 259,637.75, 389,310.53 and 178,679.87

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Solution

The fourth proportional to 259,637.75, 389,310.53 and 178,679.87 is: 267,919.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.75 : 389,310.53 = 178,679.87 : x
  2. Step 2: Convert to fraction form
    259,637.75/389,310.53 = 178,679.87/x
  3. Step 3: Cross multiply
    259,637.75x = 389,310.53 × 178,679.87
  4. Step 4: Simplify right side
    259,637.75x = 69,561,954,890.03
  5. Step 5: Solve for x
    x = 69,561,954,890.03/259,637.75
  6. Step 6: Final answer
    x = 267,919.26

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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.