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Finding the Fourth Proportional to 275,842.76, 380,832.84 and 218,712.85

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Solution

The fourth proportional to 275,842.76, 380,832.84 and 218,712.85 is: 301,958.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,842.76 : 380,832.84 = 218,712.85 : x
  2. Step 2: Convert to fraction form
    275,842.76/380,832.84 = 218,712.85/x
  3. Step 3: Cross multiply
    275,842.76x = 380,832.84 × 218,712.85
  4. Step 4: Simplify right side
    275,842.76x = 83,293,034,716.43
  5. Step 5: Solve for x
    x = 83,293,034,716.43/275,842.76
  6. Step 6: Final answer
    x = 301,958.39

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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.