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Finding the Fourth Proportional to 4,741.87, 7,112.81 and 1,279.12

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Solution

The fourth proportional to 4,741.87, 7,112.81 and 1,279.12 is: 1,918.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,741.87 : 7,112.81 = 1,279.12 : x
  2. Step 2: Convert to fraction form
    4,741.87/7,112.81 = 1,279.12/x
  3. Step 3: Cross multiply
    4,741.87x = 7,112.81 × 1,279.12
  4. Step 4: Simplify right side
    4,741.87x = 9,098,137.53
  5. Step 5: Solve for x
    x = 9,098,137.53/4,741.87
  6. Step 6: Final answer
    x = 1,918.68

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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.