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Finding the Fourth Proportional to 665,717.78, 998,160.60 and 281,269

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Solution

The fourth proportional to 665,717.78, 998,160.60 and 281,269 is: 421,727.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,717.78 : 998,160.60 = 281,269 : x
  2. Step 2: Convert to fraction form
    665,717.78/998,160.60 = 281,269/x
  3. Step 3: Cross multiply
    665,717.78x = 998,160.60 × 281,269
  4. Step 4: Simplify right side
    665,717.78x = 280,751,633,801.40
  5. Step 5: Solve for x
    x = 280,751,633,801.40/665,717.78
  6. Step 6: Final answer
    x = 421,727.71

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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.