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Finding the Fourth Proportional to 5,698.31, 7,863.64 and 3,180.38

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Solution

The fourth proportional to 5,698.31, 7,863.64 and 3,180.38 is: 4,388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,698.31 : 7,863.64 = 3,180.38 : x
  2. Step 2: Convert to fraction form
    5,698.31/7,863.64 = 3,180.38/x
  3. Step 3: Cross multiply
    5,698.31x = 7,863.64 × 3,180.38
  4. Step 4: Simplify right side
    5,698.31x = 25,009,375.09
  5. Step 5: Solve for x
    x = 25,009,375.09/5,698.31
  6. Step 6: Final answer
    x = 4,388.91

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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.