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Finding the Fourth Proportional to 219,634.40, 329,451.60 and 218,079.20

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Solution

The fourth proportional to 219,634.40, 329,451.60 and 218,079.20 is: 327,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,634.40 : 329,451.60 = 218,079.20 : x
  2. Step 2: Convert to fraction form
    219,634.40/329,451.60 = 218,079.20/x
  3. Step 3: Cross multiply
    219,634.40x = 329,451.60 × 218,079.20
  4. Step 4: Simplify right side
    219,634.40x = 71,846,541,366.72
  5. Step 5: Solve for x
    x = 71,846,541,366.72/219,634.40
  6. Step 6: Final answer
    x = 327,118.80

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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.