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Finding the Fourth Proportional to 1,372.68, 2,059.39 and 495.28

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Solution

The fourth proportional to 1,372.68, 2,059.39 and 495.28 is: 743.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.68 : 2,059.39 = 495.28 : x
  2. Step 2: Convert to fraction form
    1,372.68/2,059.39 = 495.28/x
  3. Step 3: Cross multiply
    1,372.68x = 2,059.39 × 495.28
  4. Step 4: Simplify right side
    1,372.68x = 1,019,977.87
  5. Step 5: Solve for x
    x = 1,019,977.87/1,372.68
  6. Step 6: Final answer
    x = 743.06

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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.