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Finding the Fourth Proportional to 3,958.50, 5,462.46 and 2,190

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Solution

The fourth proportional to 3,958.50, 5,462.46 and 2,190 is: 3,022.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,958.50 : 5,462.46 = 2,190 : x
  2. Step 2: Convert to fraction form
    3,958.50/5,462.46 = 2,190/x
  3. Step 3: Cross multiply
    3,958.50x = 5,462.46 × 2,190
  4. Step 4: Simplify right side
    3,958.50x = 11,962,787.40
  5. Step 5: Solve for x
    x = 11,962,787.40/3,958.50
  6. Step 6: Final answer
    x = 3,022.05

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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.