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Finding the Fourth Proportional to 543,821.40, 815,732.10 and 188,798.40

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Solution

The fourth proportional to 543,821.40, 815,732.10 and 188,798.40 is: 283,197.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,821.40 : 815,732.10 = 188,798.40 : x
  2. Step 2: Convert to fraction form
    543,821.40/815,732.10 = 188,798.40/x
  3. Step 3: Cross multiply
    543,821.40x = 815,732.10 × 188,798.40
  4. Step 4: Simplify right side
    543,821.40x = 154,008,915,308.64
  5. Step 5: Solve for x
    x = 154,008,915,308.64/543,821.40
  6. Step 6: Final answer
    x = 283,197.60

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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.