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Finding the Fourth Proportional to 219,636.40, 329,454.60 and 218,081.20

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Solution

The fourth proportional to 219,636.40, 329,454.60 and 218,081.20 is: 327,121.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,636.40 : 329,454.60 = 218,081.20 : x
  2. Step 2: Convert to fraction form
    219,636.40/329,454.60 = 218,081.20/x
  3. Step 3: Cross multiply
    219,636.40x = 329,454.60 × 218,081.20
  4. Step 4: Simplify right side
    219,636.40x = 71,847,854,513.52
  5. Step 5: Solve for x
    x = 71,847,854,513.52/219,636.40
  6. Step 6: Final answer
    x = 327,121.80

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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.