Home / 3,105.23-4,280.36-2,108.77

Finding the Fourth Proportional to 3,105.23, 4,280.36 and 2,108.77

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Solution

The fourth proportional to 3,105.23, 4,280.36 and 2,108.77 is: 2,906.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.23 : 4,280.36 = 2,108.77 : x
  2. Step 2: Convert to fraction form
    3,105.23/4,280.36 = 2,108.77/x
  3. Step 3: Cross multiply
    3,105.23x = 4,280.36 × 2,108.77
  4. Step 4: Simplify right side
    3,105.23x = 9,026,289.33
  5. Step 5: Solve for x
    x = 9,026,289.33/3,105.23
  6. Step 6: Final answer
    x = 2,906.80

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Half scale
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Double scale
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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.