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Finding the Fourth Proportional to 258,228, 387,356.58 and 92,016

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Solution

The fourth proportional to 258,228, 387,356.58 and 92,016 is: 138,029.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,228 : 387,356.58 = 92,016 : x
  2. Step 2: Convert to fraction form
    258,228/387,356.58 = 92,016/x
  3. Step 3: Cross multiply
    258,228x = 387,356.58 × 92,016
  4. Step 4: Simplify right side
    258,228x = 35,643,003,065.28
  5. Step 5: Solve for x
    x = 35,643,003,065.28/258,228
  6. Step 6: Final answer
    x = 138,029.20

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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.