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Finding the Fourth Proportional to 3,338, 5,004.30 and 1,391.66

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Solution

The fourth proportional to 3,338, 5,004.30 and 1,391.66 is: 2,086.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,338 : 5,004.30 = 1,391.66 : x
  2. Step 2: Convert to fraction form
    3,338/5,004.30 = 1,391.66/x
  3. Step 3: Cross multiply
    3,338x = 5,004.30 × 1,391.66
  4. Step 4: Simplify right side
    3,338x = 6,964,284.14
  5. Step 5: Solve for x
    x = 6,964,284.14/3,338
  6. Step 6: Final answer
    x = 2,086.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.