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Finding the Fourth Proportional to 221,970.20, 332,979.60 and 214,971.80

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Solution

The fourth proportional to 221,970.20, 332,979.60 and 214,971.80 is: 322,481.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,970.20 : 332,979.60 = 214,971.80 : x
  2. Step 2: Convert to fraction form
    221,970.20/332,979.60 = 214,971.80/x
  3. Step 3: Cross multiply
    221,970.20x = 332,979.60 × 214,971.80
  4. Step 4: Simplify right side
    221,970.20x = 71,581,223,975.28
  5. Step 5: Solve for x
    x = 71,581,223,975.28/221,970.20
  6. Step 6: Final answer
    x = 322,481.23

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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.