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Finding the Fourth Proportional to 543,616.20, 815,424.30 and 169,639.20

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Solution

The fourth proportional to 543,616.20, 815,424.30 and 169,639.20 is: 254,458.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,616.20 : 815,424.30 = 169,639.20 : x
  2. Step 2: Convert to fraction form
    543,616.20/815,424.30 = 169,639.20/x
  3. Step 3: Cross multiply
    543,616.20x = 815,424.30 × 169,639.20
  4. Step 4: Simplify right side
    543,616.20x = 138,327,925,912.56
  5. Step 5: Solve for x
    x = 138,327,925,912.56/543,616.20
  6. Step 6: Final answer
    x = 254,458.80

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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.