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Finding the Fourth Proportional to 2,758.06, 4,135.02 and 908.20

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Solution

The fourth proportional to 2,758.06, 4,135.02 and 908.20 is: 1,361.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.06 : 4,135.02 = 908.20 : x
  2. Step 2: Convert to fraction form
    2,758.06/4,135.02 = 908.20/x
  3. Step 3: Cross multiply
    2,758.06x = 4,135.02 × 908.20
  4. Step 4: Simplify right side
    2,758.06x = 3,755,425.16
  5. Step 5: Solve for x
    x = 3,755,425.16/2,758.06
  6. Step 6: Final answer
    x = 1,361.62

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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.