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Finding the Fourth Proportional to 3,969.42, 5,480.10 and 2,398.02

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Solution

The fourth proportional to 3,969.42, 5,480.10 and 2,398.02 is: 3,310.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,969.42 : 5,480.10 = 2,398.02 : x
  2. Step 2: Convert to fraction form
    3,969.42/5,480.10 = 2,398.02/x
  3. Step 3: Cross multiply
    3,969.42x = 5,480.10 × 2,398.02
  4. Step 4: Simplify right side
    3,969.42x = 13,141,389.40
  5. Step 5: Solve for x
    x = 13,141,389.40/3,969.42
  6. Step 6: Final answer
    x = 3,310.66

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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.