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Finding the Fourth Proportional to 305,370.55, 421,410.99 and 169,425.10

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Solution

The fourth proportional to 305,370.55, 421,410.99 and 169,425.10 is: 233,806.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,370.55 : 421,410.99 = 169,425.10 : x
  2. Step 2: Convert to fraction form
    305,370.55/421,410.99 = 169,425.10/x
  3. Step 3: Cross multiply
    305,370.55x = 421,410.99 × 169,425.10
  4. Step 4: Simplify right side
    305,370.55x = 71,397,599,121.85
  5. Step 5: Solve for x
    x = 71,397,599,121.85/305,370.55
  6. Step 6: Final answer
    x = 233,806.43

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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.