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Finding the Fourth Proportional to 398,680.61, 598,239.62 and 161,959.73

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Solution

The fourth proportional to 398,680.61, 598,239.62 and 161,959.73 is: 243,028.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,680.61 : 598,239.62 = 161,959.73 : x
  2. Step 2: Convert to fraction form
    398,680.61/598,239.62 = 161,959.73/x
  3. Step 3: Cross multiply
    398,680.61x = 598,239.62 × 161,959.73
  4. Step 4: Simplify right side
    398,680.61x = 96,890,726,520.70
  5. Step 5: Solve for x
    x = 96,890,726,520.70/398,680.61
  6. Step 6: Final answer
    x = 243,028.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.