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Finding the Fourth Proportional to 543,221.20, 814,248.60 and 206,131.60

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Solution

The fourth proportional to 543,221.20, 814,248.60 and 206,131.60 is: 308,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,221.20 : 814,248.60 = 206,131.60 : x
  2. Step 2: Convert to fraction form
    543,221.20/814,248.60 = 206,131.60/x
  3. Step 3: Cross multiply
    543,221.20x = 814,248.60 × 206,131.60
  4. Step 4: Simplify right side
    543,221.20x = 167,842,366,715.76
  5. Step 5: Solve for x
    x = 167,842,366,715.76/543,221.20
  6. Step 6: Final answer
    x = 308,976.10

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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.