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Finding the Fourth Proportional to 219,640.40, 329,460.60 and 218,085.20

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Solution

The fourth proportional to 219,640.40, 329,460.60 and 218,085.20 is: 327,127.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,640.40 : 329,460.60 = 218,085.20 : x
  2. Step 2: Convert to fraction form
    219,640.40/329,460.60 = 218,085.20/x
  3. Step 3: Cross multiply
    219,640.40x = 329,460.60 × 218,085.20
  4. Step 4: Simplify right side
    219,640.40x = 71,850,480,843.12
  5. Step 5: Solve for x
    x = 71,850,480,843.12/219,640.40
  6. Step 6: Final answer
    x = 327,127.80

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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.