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Finding the Fourth Proportional to 395,163.90, 545,179.41 and 251,891.10

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Solution

The fourth proportional to 395,163.90, 545,179.41 and 251,891.10 is: 347,516.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,163.90 : 545,179.41 = 251,891.10 : x
  2. Step 2: Convert to fraction form
    395,163.90/545,179.41 = 251,891.10/x
  3. Step 3: Cross multiply
    395,163.90x = 545,179.41 × 251,891.10
  4. Step 4: Simplify right side
    395,163.90x = 137,325,841,282.25
  5. Step 5: Solve for x
    x = 137,325,841,282.25/395,163.90
  6. Step 6: Final answer
    x = 347,516.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.