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Finding the Fourth Proportional to 620,156.40, 930,234.60 and 199,474.80

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Solution

The fourth proportional to 620,156.40, 930,234.60 and 199,474.80 is: 299,212.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,156.40 : 930,234.60 = 199,474.80 : x
  2. Step 2: Convert to fraction form
    620,156.40/930,234.60 = 199,474.80/x
  3. Step 3: Cross multiply
    620,156.40x = 930,234.60 × 199,474.80
  4. Step 4: Simplify right side
    620,156.40x = 185,558,360,788.08
  5. Step 5: Solve for x
    x = 185,558,360,788.08/620,156.40
  6. Step 6: Final answer
    x = 299,212.20

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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.