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Finding the Fourth Proportional to 3,991.85, 5,987.51 and 1,492.55

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Solution

The fourth proportional to 3,991.85, 5,987.51 and 1,492.55 is: 2,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.85 : 5,987.51 = 1,492.55 : x
  2. Step 2: Convert to fraction form
    3,991.85/5,987.51 = 1,492.55/x
  3. Step 3: Cross multiply
    3,991.85x = 5,987.51 × 1,492.55
  4. Step 4: Simplify right side
    3,991.85x = 8,936,620.65
  5. Step 5: Solve for x
    x = 8,936,620.65/3,991.85
  6. Step 6: Final answer
    x = 2,238.72

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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.