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Finding the Fourth Proportional to 305,481.16, 421,713.30 and 273,521.80

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Solution

The fourth proportional to 305,481.16, 421,713.30 and 273,521.80 is: 377,593.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,481.16 : 421,713.30 = 273,521.80 : x
  2. Step 2: Convert to fraction form
    305,481.16/421,713.30 = 273,521.80/x
  3. Step 3: Cross multiply
    305,481.16x = 421,713.30 × 273,521.80
  4. Step 4: Simplify right side
    305,481.16x = 115,347,780,899.94
  5. Step 5: Solve for x
    x = 115,347,780,899.94/305,481.16
  6. Step 6: Final answer
    x = 377,593.76

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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.