Home / 3,905.64-5,388.26-2,489.06

Finding the Fourth Proportional to 3,905.64, 5,388.26 and 2,489.06

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Solution

The fourth proportional to 3,905.64, 5,388.26 and 2,489.06 is: 3,433.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.64 : 5,388.26 = 2,489.06 : x
  2. Step 2: Convert to fraction form
    3,905.64/5,388.26 = 2,489.06/x
  3. Step 3: Cross multiply
    3,905.64x = 5,388.26 × 2,489.06
  4. Step 4: Simplify right side
    3,905.64x = 13,411,702.44
  5. Step 5: Solve for x
    x = 13,411,702.44/3,905.64
  6. Step 6: Final answer
    x = 3,433.93

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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.