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Finding the Fourth Proportional to 3,978.14, 5,967.30 and 1,381.08

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Solution

The fourth proportional to 3,978.14, 5,967.30 and 1,381.08 is: 2,071.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.14 : 5,967.30 = 1,381.08 : x
  2. Step 2: Convert to fraction form
    3,978.14/5,967.30 = 1,381.08/x
  3. Step 3: Cross multiply
    3,978.14x = 5,967.30 × 1,381.08
  4. Step 4: Simplify right side
    3,978.14x = 8,241,318.68
  5. Step 5: Solve for x
    x = 8,241,318.68/3,978.14
  6. Step 6: Final answer
    x = 2,071.65

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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.