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Finding the Fourth Proportional to 3,858.99, 5,321.10 and 2,794.65

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Solution

The fourth proportional to 3,858.99, 5,321.10 and 2,794.65 is: 3,853.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.99 : 5,321.10 = 2,794.65 : x
  2. Step 2: Convert to fraction form
    3,858.99/5,321.10 = 2,794.65/x
  3. Step 3: Cross multiply
    3,858.99x = 5,321.10 × 2,794.65
  4. Step 4: Simplify right side
    3,858.99x = 14,870,612.12
  5. Step 5: Solve for x
    x = 14,870,612.12/3,858.99
  6. Step 6: Final answer
    x = 3,853.50

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.