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Finding the Fourth Proportional to 305,691.44, 421,867.36 and 169,725.39

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Solution

The fourth proportional to 305,691.44, 421,867.36 and 169,725.39 is: 234,228.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,691.44 : 421,867.36 = 169,725.39 : x
  2. Step 2: Convert to fraction form
    305,691.44/421,867.36 = 169,725.39/x
  3. Step 3: Cross multiply
    305,691.44x = 421,867.36 × 169,725.39
  4. Step 4: Simplify right side
    305,691.44x = 71,601,601,355.64
  5. Step 5: Solve for x
    x = 71,601,601,355.64/305,691.44
  6. Step 6: Final answer
    x = 234,228.35

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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.