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Finding the Fourth Proportional to 290,691.36, 401,118.01 and 168,204.78

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Solution

The fourth proportional to 290,691.36, 401,118.01 and 168,204.78 is: 232,101.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,691.36 : 401,118.01 = 168,204.78 : x
  2. Step 2: Convert to fraction form
    290,691.36/401,118.01 = 168,204.78/x
  3. Step 3: Cross multiply
    290,691.36x = 401,118.01 × 168,204.78
  4. Step 4: Simplify right side
    290,691.36x = 67,469,966,205.58
  5. Step 5: Solve for x
    x = 67,469,966,205.58/290,691.36
  6. Step 6: Final answer
    x = 232,101.73

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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.