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Finding the Fourth Proportional to 263,279.10, 394,918.65 and 85,804.05

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Solution

The fourth proportional to 263,279.10, 394,918.65 and 85,804.05 is: 128,706.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,279.10 : 394,918.65 = 85,804.05 : x
  2. Step 2: Convert to fraction form
    263,279.10/394,918.65 = 85,804.05/x
  3. Step 3: Cross multiply
    263,279.10x = 394,918.65 × 85,804.05
  4. Step 4: Simplify right side
    263,279.10x = 33,885,619,590.53
  5. Step 5: Solve for x
    x = 33,885,619,590.53/263,279.10
  6. Step 6: Final answer
    x = 128,706.08

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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.