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Finding the Fourth Proportional to 3,958.42, 5,939.65 and 1,620.15

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Solution

The fourth proportional to 3,958.42, 5,939.65 and 1,620.15 is: 2,431.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,958.42 : 5,939.65 = 1,620.15 : x
  2. Step 2: Convert to fraction form
    3,958.42/5,939.65 = 1,620.15/x
  3. Step 3: Cross multiply
    3,958.42x = 5,939.65 × 1,620.15
  4. Step 4: Simplify right side
    3,958.42x = 9,623,123.95
  5. Step 5: Solve for x
    x = 9,623,123.95/3,958.42
  6. Step 6: Final answer
    x = 2,431.05

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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.