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Finding the Fourth Proportional to 8,240.76, 11,372.58 and 4,514.76

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Solution

The fourth proportional to 8,240.76, 11,372.58 and 4,514.76 is: 6,230.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.76 : 11,372.58 = 4,514.76 : x
  2. Step 2: Convert to fraction form
    8,240.76/11,372.58 = 4,514.76/x
  3. Step 3: Cross multiply
    8,240.76x = 11,372.58 × 4,514.76
  4. Step 4: Simplify right side
    8,240.76x = 51,344,469.28
  5. Step 5: Solve for x
    x = 51,344,469.28/8,240.76
  6. Step 6: Final answer
    x = 6,230.55

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Find fourth proportional to 4,120.38, 5,686.29 and 2,257.38
Half scale
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Double scale
Find fourth proportional to 8,241.76, 11,373.96 and 4,515.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.