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Finding the Fourth Proportional to 305,576.73, 421,689.88 and 169,612.31

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Solution

The fourth proportional to 305,576.73, 421,689.88 and 169,612.31 is: 234,061.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,576.73 : 421,689.88 = 169,612.31 : x
  2. Step 2: Convert to fraction form
    305,576.73/421,689.88 = 169,612.31/x
  3. Step 3: Cross multiply
    305,576.73x = 421,689.88 × 169,612.31
  4. Step 4: Simplify right side
    305,576.73x = 71,523,794,650.42
  5. Step 5: Solve for x
    x = 71,523,794,650.42/305,576.73
  6. Step 6: Final answer
    x = 234,061.65

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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.