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Finding the Fourth Proportional to 543,809.20, 815,713.80 and 188,859.10

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Solution

The fourth proportional to 543,809.20, 815,713.80 and 188,859.10 is: 283,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,809.20 : 815,713.80 = 188,859.10 : x
  2. Step 2: Convert to fraction form
    543,809.20/815,713.80 = 188,859.10/x
  3. Step 3: Cross multiply
    543,809.20x = 815,713.80 × 188,859.10
  4. Step 4: Simplify right side
    543,809.20x = 154,054,974,125.58
  5. Step 5: Solve for x
    x = 154,054,974,125.58/543,809.20
  6. Step 6: Final answer
    x = 283,288.65

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Double scale
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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.