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Finding the Fourth Proportional to 218,720.20, 328,469.10 and 159,622.60

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Solution

The fourth proportional to 218,720.20, 328,469.10 and 159,622.60 is: 239,717.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,720.20 : 328,469.10 = 159,622.60 : x
  2. Step 2: Convert to fraction form
    218,720.20/328,469.10 = 159,622.60/x
  3. Step 3: Cross multiply
    218,720.20x = 328,469.10 × 159,622.60
  4. Step 4: Simplify right side
    218,720.20x = 52,431,091,761.66
  5. Step 5: Solve for x
    x = 52,431,091,761.66/218,720.20
  6. Step 6: Final answer
    x = 239,717.65

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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.