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Finding the Fourth Proportional to 305,529.90, 421,635.81 and 169,572.61

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Solution

The fourth proportional to 305,529.90, 421,635.81 and 169,572.61 is: 234,012.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,529.90 : 421,635.81 = 169,572.61 : x
  2. Step 2: Convert to fraction form
    305,529.90/421,635.81 = 169,572.61/x
  3. Step 3: Cross multiply
    305,529.90x = 421,635.81 × 169,572.61
  4. Step 4: Simplify right side
    305,529.90x = 71,497,884,771.16
  5. Step 5: Solve for x
    x = 71,497,884,771.16/305,529.90
  6. Step 6: Final answer
    x = 234,012.73

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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.