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Finding the Fourth Proportional to 259,121.28, 387,804 and 159,344.72

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Solution

The fourth proportional to 259,121.28, 387,804 and 159,344.72 is: 238,477.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,121.28 : 387,804 = 159,344.72 : x
  2. Step 2: Convert to fraction form
    259,121.28/387,804 = 159,344.72/x
  3. Step 3: Cross multiply
    259,121.28x = 387,804 × 159,344.72
  4. Step 4: Simplify right side
    259,121.28x = 61,794,519,794.88
  5. Step 5: Solve for x
    x = 61,794,519,794.88/259,121.28
  6. Step 6: Final answer
    x = 238,477.21

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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.