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Finding the Fourth Proportional to 283,896.45, 391,678.17 and 181,978.11

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Solution

The fourth proportional to 283,896.45, 391,678.17 and 181,978.11 is: 251,066.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,896.45 : 391,678.17 = 181,978.11 : x
  2. Step 2: Convert to fraction form
    283,896.45/391,678.17 = 181,978.11/x
  3. Step 3: Cross multiply
    283,896.45x = 391,678.17 × 181,978.11
  4. Step 4: Simplify right side
    283,896.45x = 71,276,852,422.44
  5. Step 5: Solve for x
    x = 71,276,852,422.44/283,896.45
  6. Step 6: Final answer
    x = 251,066.37

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1.5x scale

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.