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Finding the Fourth Proportional to 305,039.39, 420,979.55 and 169,115.97

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Solution

The fourth proportional to 305,039.39, 420,979.55 and 169,115.97 is: 233,394.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,039.39 : 420,979.55 = 169,115.97 : x
  2. Step 2: Convert to fraction form
    305,039.39/420,979.55 = 169,115.97/x
  3. Step 3: Cross multiply
    305,039.39x = 420,979.55 × 169,115.97
  4. Step 4: Simplify right side
    305,039.39x = 71,194,364,948.41
  5. Step 5: Solve for x
    x = 71,194,364,948.41/305,039.39
  6. Step 6: Final answer
    x = 233,394.01

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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.