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Finding the Fourth Proportional to 3,879.86, 5,819.79 and 958.22

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Solution

The fourth proportional to 3,879.86, 5,819.79 and 958.22 is: 1,437.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.86 : 5,819.79 = 958.22 : x
  2. Step 2: Convert to fraction form
    3,879.86/5,819.79 = 958.22/x
  3. Step 3: Cross multiply
    3,879.86x = 5,819.79 × 958.22
  4. Step 4: Simplify right side
    3,879.86x = 5,576,639.17
  5. Step 5: Solve for x
    x = 5,576,639.17/3,879.86
  6. Step 6: Final answer
    x = 1,437.33

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