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Finding the Fourth Proportional to 220,852.80, 331,279.20 and 205,981.20

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Solution

The fourth proportional to 220,852.80, 331,279.20 and 205,981.20 is: 308,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,852.80 : 331,279.20 = 205,981.20 : x
  2. Step 2: Convert to fraction form
    220,852.80/331,279.20 = 205,981.20/x
  3. Step 3: Cross multiply
    220,852.80x = 331,279.20 × 205,981.20
  4. Step 4: Simplify right side
    220,852.80x = 68,237,287,151.04
  5. Step 5: Solve for x
    x = 68,237,287,151.04/220,852.80
  6. Step 6: Final answer
    x = 308,971.80

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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.