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Finding the Fourth Proportional to 3,987.95, 5,988.03 and 2,142.67

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Solution

The fourth proportional to 3,987.95, 5,988.03 and 2,142.67 is: 3,217.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.95 : 5,988.03 = 2,142.67 : x
  2. Step 2: Convert to fraction form
    3,987.95/5,988.03 = 2,142.67/x
  3. Step 3: Cross multiply
    3,987.95x = 5,988.03 × 2,142.67
  4. Step 4: Simplify right side
    3,987.95x = 12,830,372.24
  5. Step 5: Solve for x
    x = 12,830,372.24/3,987.95
  6. Step 6: Final answer
    x = 3,217.29

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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.