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Finding the Fourth Proportional to 193,640.80, 290,461.20 and 188,456.80

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Solution

The fourth proportional to 193,640.80, 290,461.20 and 188,456.80 is: 282,685.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,640.80 : 290,461.20 = 188,456.80 : x
  2. Step 2: Convert to fraction form
    193,640.80/290,461.20 = 188,456.80/x
  3. Step 3: Cross multiply
    193,640.80x = 290,461.20 × 188,456.80
  4. Step 4: Simplify right side
    193,640.80x = 54,739,388,276.16
  5. Step 5: Solve for x
    x = 54,739,388,276.16/193,640.80
  6. Step 6: Final answer
    x = 282,685.20

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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.