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Finding the Fourth Proportional to 275,820.89, 380,638.58 and 154,969.97

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Solution

The fourth proportional to 275,820.89, 380,638.58 and 154,969.97 is: 213,861.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,820.89 : 380,638.58 = 154,969.97 : x
  2. Step 2: Convert to fraction form
    275,820.89/380,638.58 = 154,969.97/x
  3. Step 3: Cross multiply
    275,820.89x = 380,638.58 × 154,969.97
  4. Step 4: Simplify right side
    275,820.89x = 58,987,546,645.40
  5. Step 5: Solve for x
    x = 58,987,546,645.40/275,820.89
  6. Step 6: Final answer
    x = 213,861.78

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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.