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Finding the Fourth Proportional to 305,398.05, 421,499.90 and 169,475.66

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Solution

The fourth proportional to 305,398.05, 421,499.90 and 169,475.66 is: 233,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,398.05 : 421,499.90 = 169,475.66 : x
  2. Step 2: Convert to fraction form
    305,398.05/421,499.90 = 169,475.66/x
  3. Step 3: Cross multiply
    305,398.05x = 421,499.90 × 169,475.66
  4. Step 4: Simplify right side
    305,398.05x = 71,433,970,787.56
  5. Step 5: Solve for x
    x = 71,433,970,787.56/305,398.05
  6. Step 6: Final answer
    x = 233,904.48

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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.