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Finding the Fourth Proportional to 305,426.95, 421,488.70 and 169,481.61

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Solution

The fourth proportional to 305,426.95, 421,488.70 and 169,481.61 is: 233,884.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,426.95 : 421,488.70 = 169,481.61 : x
  2. Step 2: Convert to fraction form
    305,426.95/421,488.70 = 169,481.61/x
  3. Step 3: Cross multiply
    305,426.95x = 421,488.70 × 169,481.61
  4. Step 4: Simplify right side
    305,426.95x = 71,434,583,049.10
  5. Step 5: Solve for x
    x = 71,434,583,049.10/305,426.95
  6. Step 6: Final answer
    x = 233,884.35

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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.