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Finding the Fourth Proportional to 3,987.87, 5,985.44 and 3,060.42

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Solution

The fourth proportional to 3,987.87, 5,985.44 and 3,060.42 is: 4,593.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.87 : 5,985.44 = 3,060.42 : x
  2. Step 2: Convert to fraction form
    3,987.87/5,985.44 = 3,060.42/x
  3. Step 3: Cross multiply
    3,987.87x = 5,985.44 × 3,060.42
  4. Step 4: Simplify right side
    3,987.87x = 18,317,951.23
  5. Step 5: Solve for x
    x = 18,317,951.23/3,987.87
  6. Step 6: Final answer
    x = 4,593.42

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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.