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Finding the Fourth Proportional to 2,639.48, 3,958.02 and 994.86

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Solution

The fourth proportional to 2,639.48, 3,958.02 and 994.86 is: 1,491.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.48 : 3,958.02 = 994.86 : x
  2. Step 2: Convert to fraction form
    2,639.48/3,958.02 = 994.86/x
  3. Step 3: Cross multiply
    2,639.48x = 3,958.02 × 994.86
  4. Step 4: Simplify right side
    2,639.48x = 3,937,675.78
  5. Step 5: Solve for x
    x = 3,937,675.78/2,639.48
  6. Step 6: Final answer
    x = 1,491.84

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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.