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Finding the Fourth Proportional to 3,910.74, 5,398.83 and 3,379.92

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Solution

The fourth proportional to 3,910.74, 5,398.83 and 3,379.92 is: 4,666.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.74 : 5,398.83 = 3,379.92 : x
  2. Step 2: Convert to fraction form
    3,910.74/5,398.83 = 3,379.92/x
  3. Step 3: Cross multiply
    3,910.74x = 5,398.83 × 3,379.92
  4. Step 4: Simplify right side
    3,910.74x = 18,247,613.49
  5. Step 5: Solve for x
    x = 18,247,613.49/3,910.74
  6. Step 6: Final answer
    x = 4,666.03

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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.