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Finding the Fourth Proportional to 289,892.72, 434,009.64 and 196,230.80

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Solution

The fourth proportional to 289,892.72, 434,009.64 and 196,230.80 is: 293,784.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,892.72 : 434,009.64 = 196,230.80 : x
  2. Step 2: Convert to fraction form
    289,892.72/434,009.64 = 196,230.80/x
  3. Step 3: Cross multiply
    289,892.72x = 434,009.64 × 196,230.80
  4. Step 4: Simplify right side
    289,892.72x = 85,166,058,864.91
  5. Step 5: Solve for x
    x = 85,166,058,864.91/289,892.72
  6. Step 6: Final answer
    x = 293,784.75

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1.5x scale

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.