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Finding the Fourth Proportional to 3,976.85, 5,488.02 and 2,405.22

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Solution

The fourth proportional to 3,976.85, 5,488.02 and 2,405.22 is: 3,319.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,976.85 : 5,488.02 = 2,405.22 : x
  2. Step 2: Convert to fraction form
    3,976.85/5,488.02 = 2,405.22/x
  3. Step 3: Cross multiply
    3,976.85x = 5,488.02 × 2,405.22
  4. Step 4: Simplify right side
    3,976.85x = 13,199,895.46
  5. Step 5: Solve for x
    x = 13,199,895.46/3,976.85
  6. Step 6: Final answer
    x = 3,319.19

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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.