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Finding the Fourth Proportional to 305,520.87, 421,606.31 and 169,560.48

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Solution

The fourth proportional to 305,520.87, 421,606.31 and 169,560.48 is: 233,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,520.87 : 421,606.31 = 169,560.48 : x
  2. Step 2: Convert to fraction form
    305,520.87/421,606.31 = 169,560.48/x
  3. Step 3: Cross multiply
    305,520.87x = 421,606.31 × 169,560.48
  4. Step 4: Simplify right side
    305,520.87x = 71,487,767,446.83
  5. Step 5: Solve for x
    x = 71,487,767,446.83/305,520.87
  6. Step 6: Final answer
    x = 233,986.53

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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.