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Finding the Fourth Proportional to 619,279.80, 928,919.70 and 198,598.20

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Solution

The fourth proportional to 619,279.80, 928,919.70 and 198,598.20 is: 297,897.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,279.80 : 928,919.70 = 198,598.20 : x
  2. Step 2: Convert to fraction form
    619,279.80/928,919.70 = 198,598.20/x
  3. Step 3: Cross multiply
    619,279.80x = 928,919.70 × 198,598.20
  4. Step 4: Simplify right side
    619,279.80x = 184,481,780,364.54
  5. Step 5: Solve for x
    x = 184,481,780,364.54/619,279.80
  6. Step 6: Final answer
    x = 297,897.30

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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.