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Finding the Fourth Proportional to 393,781.98, 590,795.54 and 141,064.65

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Solution

The fourth proportional to 393,781.98, 590,795.54 and 141,064.65 is: 211,640.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,781.98 : 590,795.54 = 141,064.65 : x
  2. Step 2: Convert to fraction form
    393,781.98/590,795.54 = 141,064.65/x
  3. Step 3: Cross multiply
    393,781.98x = 590,795.54 × 141,064.65
  4. Step 4: Simplify right side
    393,781.98x = 83,340,365,895.33
  5. Step 5: Solve for x
    x = 83,340,365,895.33/393,781.98
  6. Step 6: Final answer
    x = 211,640.88

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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.