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Finding the Fourth Proportional to 305,388.56, 421,436.31 and 171,252.56

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Solution

The fourth proportional to 305,388.56, 421,436.31 and 171,252.56 is: 236,328.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,388.56 : 421,436.31 = 171,252.56 : x
  2. Step 2: Convert to fraction form
    305,388.56/421,436.31 = 171,252.56/x
  3. Step 3: Cross multiply
    305,388.56x = 421,436.31 × 171,252.56
  4. Step 4: Simplify right side
    305,388.56x = 72,172,046,964.45
  5. Step 5: Solve for x
    x = 72,172,046,964.45/305,388.56
  6. Step 6: Final answer
    x = 236,328.59

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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.