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Finding the Fourth Proportional to 279,402.15, 419,204.61 and 172,661.70

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Solution

The fourth proportional to 279,402.15, 419,204.61 and 172,661.70 is: 259,055.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,402.15 : 419,204.61 = 172,661.70 : x
  2. Step 2: Convert to fraction form
    279,402.15/419,204.61 = 172,661.70/x
  3. Step 3: Cross multiply
    279,402.15x = 419,204.61 × 172,661.70
  4. Step 4: Simplify right side
    279,402.15x = 72,380,580,610.44
  5. Step 5: Solve for x
    x = 72,380,580,610.44/279,402.15
  6. Step 6: Final answer
    x = 259,055.20

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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.