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Finding the Fourth Proportional to 3,978.84, 5,964.40 and 1,512.96

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Solution

The fourth proportional to 3,978.84, 5,964.40 and 1,512.96 is: 2,267.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.84 : 5,964.40 = 1,512.96 : x
  2. Step 2: Convert to fraction form
    3,978.84/5,964.40 = 1,512.96/x
  3. Step 3: Cross multiply
    3,978.84x = 5,964.40 × 1,512.96
  4. Step 4: Simplify right side
    3,978.84x = 9,023,898.62
  5. Step 5: Solve for x
    x = 9,023,898.62/3,978.84
  6. Step 6: Final answer
    x = 2,267.97

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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.