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Finding the Fourth Proportional to 3,778, 5,214.18 and 2,380.48

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Solution

The fourth proportional to 3,778, 5,214.18 and 2,380.48 is: 3,285.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,778 : 5,214.18 = 2,380.48 : x
  2. Step 2: Convert to fraction form
    3,778/5,214.18 = 2,380.48/x
  3. Step 3: Cross multiply
    3,778x = 5,214.18 × 2,380.48
  4. Step 4: Simplify right side
    3,778x = 12,412,251.21
  5. Step 5: Solve for x
    x = 12,412,251.21/3,778
  6. Step 6: Final answer
    x = 3,285.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.