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Finding the Fourth Proportional to 620.28, 855.54 and 371.52

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Solution

The fourth proportional to 620.28, 855.54 and 371.52 is: 512.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 855.54 = 371.52 : x
  2. Step 2: Convert to fraction form
    620.28/855.54 = 371.52/x
  3. Step 3: Cross multiply
    620.28x = 855.54 × 371.52
  4. Step 4: Simplify right side
    620.28x = 317,850.22
  5. Step 5: Solve for x
    x = 317,850.22/620.28
  6. Step 6: Final answer
    x = 512.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.