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Finding the Fourth Proportional to 315,481.88, 435,362.74 and 172,241.92

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Solution

The fourth proportional to 315,481.88, 435,362.74 and 172,241.92 is: 237,692.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,481.88 : 435,362.74 = 172,241.92 : x
  2. Step 2: Convert to fraction form
    315,481.88/435,362.74 = 172,241.92/x
  3. Step 3: Cross multiply
    315,481.88x = 435,362.74 × 172,241.92
  4. Step 4: Simplify right side
    315,481.88x = 74,987,714,234.06
  5. Step 5: Solve for x
    x = 74,987,714,234.06/315,481.88
  6. Step 6: Final answer
    x = 237,692.62

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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.