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Finding the Fourth Proportional to 393,618.26, 543,100.47 and 291,879.02

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Solution

The fourth proportional to 393,618.26, 543,100.47 and 291,879.02 is: 402,724.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,618.26 : 543,100.47 = 291,879.02 : x
  2. Step 2: Convert to fraction form
    393,618.26/543,100.47 = 291,879.02/x
  3. Step 3: Cross multiply
    393,618.26x = 543,100.47 × 291,879.02
  4. Step 4: Simplify right side
    393,618.26x = 158,519,632,945.14
  5. Step 5: Solve for x
    x = 158,519,632,945.14/393,618.26
  6. Step 6: Final answer
    x = 402,724.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.