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Finding the Fourth Proportional to 741.11, 1,111.66 and 193.24

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Solution

The fourth proportional to 741.11, 1,111.66 and 193.24 is: 289.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.11 : 1,111.66 = 193.24 : x
  2. Step 2: Convert to fraction form
    741.11/1,111.66 = 193.24/x
  3. Step 3: Cross multiply
    741.11x = 1,111.66 × 193.24
  4. Step 4: Simplify right side
    741.11x = 214,819.47
  5. Step 5: Solve for x
    x = 214,819.47/741.11
  6. Step 6: Final answer
    x = 289.86

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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.