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Finding the Fourth Proportional to 305,618.65, 421,755.38 and 169,650.43

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Solution

The fourth proportional to 305,618.65, 421,755.38 and 169,650.43 is: 234,118.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,618.65 : 421,755.38 = 169,650.43 : x
  2. Step 2: Convert to fraction form
    305,618.65/421,755.38 = 169,650.43/x
  3. Step 3: Cross multiply
    305,618.65x = 421,755.38 × 169,650.43
  4. Step 4: Simplify right side
    305,618.65x = 71,550,981,571.81
  5. Step 5: Solve for x
    x = 71,550,981,571.81/305,618.65
  6. Step 6: Final answer
    x = 234,118.51

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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.