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Finding the Fourth Proportional to 272,620.40, 408,930.60 and 172,893.20

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Solution

The fourth proportional to 272,620.40, 408,930.60 and 172,893.20 is: 259,339.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,620.40 : 408,930.60 = 172,893.20 : x
  2. Step 2: Convert to fraction form
    272,620.40/408,930.60 = 172,893.20/x
  3. Step 3: Cross multiply
    272,620.40x = 408,930.60 × 172,893.20
  4. Step 4: Simplify right side
    272,620.40x = 70,701,320,011.92
  5. Step 5: Solve for x
    x = 70,701,320,011.92/272,620.40
  6. Step 6: Final answer
    x = 259,339.80

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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.