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Finding the Fourth Proportional to 458,087.80, 687,131.70 and 192,148.60

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Solution

The fourth proportional to 458,087.80, 687,131.70 and 192,148.60 is: 288,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,087.80 : 687,131.70 = 192,148.60 : x
  2. Step 2: Convert to fraction form
    458,087.80/687,131.70 = 192,148.60/x
  3. Step 3: Cross multiply
    458,087.80x = 687,131.70 × 192,148.60
  4. Step 4: Simplify right side
    458,087.80x = 132,031,394,170.62
  5. Step 5: Solve for x
    x = 132,031,394,170.62/458,087.80
  6. Step 6: Final answer
    x = 288,222.90

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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.