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Finding the Fourth Proportional to 643,556.42, 965,460.46 and 194,313.86

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Solution

The fourth proportional to 643,556.42, 965,460.46 and 194,313.86 is: 291,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,556.42 : 965,460.46 = 194,313.86 : x
  2. Step 2: Convert to fraction form
    643,556.42/965,460.46 = 194,313.86/x
  3. Step 3: Cross multiply
    643,556.42x = 965,460.46 × 194,313.86
  4. Step 4: Simplify right side
    643,556.42x = 187,602,348,659.98
  5. Step 5: Solve for x
    x = 187,602,348,659.98/643,556.42
  6. Step 6: Final answer
    x = 291,508.78

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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.