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Finding the Fourth Proportional to 1,662.16, 2,489.04 and 1,076.20

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Solution

The fourth proportional to 1,662.16, 2,489.04 and 1,076.20 is: 1,611.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,662.16 : 2,489.04 = 1,076.20 : x
  2. Step 2: Convert to fraction form
    1,662.16/2,489.04 = 1,076.20/x
  3. Step 3: Cross multiply
    1,662.16x = 2,489.04 × 1,076.20
  4. Step 4: Simplify right side
    1,662.16x = 2,678,704.85
  5. Step 5: Solve for x
    x = 2,678,704.85/1,662.16
  6. Step 6: Final answer
    x = 1,611.58

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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.