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Finding the Fourth Proportional to 305,256.56, 421,226.22 and 169,290.09

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Solution

The fourth proportional to 305,256.56, 421,226.22 and 169,290.09 is: 233,604.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,256.56 : 421,226.22 = 169,290.09 : x
  2. Step 2: Convert to fraction form
    305,256.56/421,226.22 = 169,290.09/x
  3. Step 3: Cross multiply
    305,256.56x = 421,226.22 × 169,290.09
  4. Step 4: Simplify right side
    305,256.56x = 71,309,424,736.65
  5. Step 5: Solve for x
    x = 71,309,424,736.65/305,256.56
  6. Step 6: Final answer
    x = 233,604.89

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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.