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Finding the Fourth Proportional to 312,892.67, 431,788.83 and 169,650.25

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Solution

The fourth proportional to 312,892.67, 431,788.83 and 169,650.25 is: 234,115.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,892.67 : 431,788.83 = 169,650.25 : x
  2. Step 2: Convert to fraction form
    312,892.67/431,788.83 = 169,650.25/x
  3. Step 3: Cross multiply
    312,892.67x = 431,788.83 × 169,650.25
  4. Step 4: Simplify right side
    312,892.67x = 73,253,081,241.05
  5. Step 5: Solve for x
    x = 73,253,081,241.05/312,892.67
  6. Step 6: Final answer
    x = 234,115.68

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1.5x scale

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.