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Finding the Fourth Proportional to 3,838.58, 5,745.48 and 1,987.16

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Solution

The fourth proportional to 3,838.58, 5,745.48 and 1,987.16 is: 2,974.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,838.58 : 5,745.48 = 1,987.16 : x
  2. Step 2: Convert to fraction form
    3,838.58/5,745.48 = 1,987.16/x
  3. Step 3: Cross multiply
    3,838.58x = 5,745.48 × 1,987.16
  4. Step 4: Simplify right side
    3,838.58x = 11,417,188.04
  5. Step 5: Solve for x
    x = 11,417,188.04/3,838.58
  6. Step 6: Final answer
    x = 2,974.33

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1.5x scale

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.