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Finding the Fourth Proportional to 305,609.43, 421,719.90 and 169,632.69

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Solution

The fourth proportional to 305,609.43, 421,719.90 and 169,632.69 is: 234,081.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,609.43 : 421,719.90 = 169,632.69 : x
  2. Step 2: Convert to fraction form
    305,609.43/421,719.90 = 169,632.69/x
  3. Step 3: Cross multiply
    305,609.43x = 421,719.90 × 169,632.69
  4. Step 4: Simplify right side
    305,609.43x = 71,537,481,063.53
  5. Step 5: Solve for x
    x = 71,537,481,063.53/305,609.43
  6. Step 6: Final answer
    x = 234,081.39

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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.