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Finding the Fourth Proportional to 305,567.78, 421,679.39 and 169,601.31

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Solution

The fourth proportional to 305,567.78, 421,679.39 and 169,601.31 is: 234,047.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,567.78 : 421,679.39 = 169,601.31 : x
  2. Step 2: Convert to fraction form
    305,567.78/421,679.39 = 169,601.31/x
  3. Step 3: Cross multiply
    305,567.78x = 421,679.39 × 169,601.31
  4. Step 4: Simplify right side
    305,567.78x = 71,517,376,095.99
  5. Step 5: Solve for x
    x = 71,517,376,095.99/305,567.78
  6. Step 6: Final answer
    x = 234,047.51

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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.