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Finding the Fourth Proportional to 547,771.80, 821,657.70 and 193,186.20

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Solution

The fourth proportional to 547,771.80, 821,657.70 and 193,186.20 is: 289,779.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,771.80 : 821,657.70 = 193,186.20 : x
  2. Step 2: Convert to fraction form
    547,771.80/821,657.70 = 193,186.20/x
  3. Step 3: Cross multiply
    547,771.80x = 821,657.70 × 193,186.20
  4. Step 4: Simplify right side
    547,771.80x = 158,732,928,763.74
  5. Step 5: Solve for x
    x = 158,732,928,763.74/547,771.80
  6. Step 6: Final answer
    x = 289,779.30

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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.