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Finding the Fourth Proportional to 305,290.20, 421,326.36 and 169,367.97

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Solution

The fourth proportional to 305,290.20, 421,326.36 and 169,367.97 is: 233,742.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,290.20 : 421,326.36 = 169,367.97 : x
  2. Step 2: Convert to fraction form
    305,290.20/421,326.36 = 169,367.97/x
  3. Step 3: Cross multiply
    305,290.20x = 421,326.36 × 169,367.97
  4. Step 4: Simplify right side
    305,290.20x = 71,359,190,300.69
  5. Step 5: Solve for x
    x = 71,359,190,300.69/305,290.20
  6. Step 6: Final answer
    x = 233,742.16

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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.