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Finding the Fourth Proportional to 2,469.71, 3,704.56 and 989.60

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Solution

The fourth proportional to 2,469.71, 3,704.56 and 989.60 is: 1,484.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,469.71 : 3,704.56 = 989.60 : x
  2. Step 2: Convert to fraction form
    2,469.71/3,704.56 = 989.60/x
  3. Step 3: Cross multiply
    2,469.71x = 3,704.56 × 989.60
  4. Step 4: Simplify right side
    2,469.71x = 3,666,032.58
  5. Step 5: Solve for x
    x = 3,666,032.58/2,469.71
  6. Step 6: Final answer
    x = 1,484.40

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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.