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Finding the Fourth Proportional to 289,186.62, 399,079.54 and 168,398.34

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Solution

The fourth proportional to 289,186.62, 399,079.54 and 168,398.34 is: 232,390.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,186.62 : 399,079.54 = 168,398.34 : x
  2. Step 2: Convert to fraction form
    289,186.62/399,079.54 = 168,398.34/x
  3. Step 3: Cross multiply
    289,186.62x = 399,079.54 × 168,398.34
  4. Step 4: Simplify right side
    289,186.62x = 67,204,332,063.96
  5. Step 5: Solve for x
    x = 67,204,332,063.96/289,186.62
  6. Step 6: Final answer
    x = 232,390.88

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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.