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Finding the Fourth Proportional to 2,469.97, 3,704.95 and 989.86

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Solution

The fourth proportional to 2,469.97, 3,704.95 and 989.86 is: 1,484.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,469.97 : 3,704.95 = 989.86 : x
  2. Step 2: Convert to fraction form
    2,469.97/3,704.95 = 989.86/x
  3. Step 3: Cross multiply
    2,469.97x = 3,704.95 × 989.86
  4. Step 4: Simplify right side
    2,469.97x = 3,667,381.81
  5. Step 5: Solve for x
    x = 3,667,381.81/2,469.97
  6. Step 6: Final answer
    x = 1,484.79

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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.