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Finding the Fourth Proportional to 203,910.80, 305,866.20 and 154,144.40

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Solution

The fourth proportional to 203,910.80, 305,866.20 and 154,144.40 is: 231,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,910.80 : 305,866.20 = 154,144.40 : x
  2. Step 2: Convert to fraction form
    203,910.80/305,866.20 = 154,144.40/x
  3. Step 3: Cross multiply
    203,910.80x = 305,866.20 × 154,144.40
  4. Step 4: Simplify right side
    203,910.80x = 47,147,561,879.28
  5. Step 5: Solve for x
    x = 47,147,561,879.28/203,910.80
  6. Step 6: Final answer
    x = 231,216.60

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1.5x scale

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.