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Finding the Fourth Proportional to 643,823.70, 965,735.55 and 194,613.90

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Solution

The fourth proportional to 643,823.70, 965,735.55 and 194,613.90 is: 291,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,823.70 : 965,735.55 = 194,613.90 : x
  2. Step 2: Convert to fraction form
    643,823.70/965,735.55 = 194,613.90/x
  3. Step 3: Cross multiply
    643,823.70x = 965,735.55 × 194,613.90
  4. Step 4: Simplify right side
    643,823.70x = 187,945,561,754.15
  5. Step 5: Solve for x
    x = 187,945,561,754.15/643,823.70
  6. Step 6: Final answer
    x = 291,920.85

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Similar ratio
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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.