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Finding the Fourth Proportional to 355.97, 531.24 and 351.38

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Solution

The fourth proportional to 355.97, 531.24 and 351.38 is: 524.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.97 : 531.24 = 351.38 : x
  2. Step 2: Convert to fraction form
    355.97/531.24 = 351.38/x
  3. Step 3: Cross multiply
    355.97x = 531.24 × 351.38
  4. Step 4: Simplify right side
    355.97x = 186,667.11
  5. Step 5: Solve for x
    x = 186,667.11/355.97
  6. Step 6: Final answer
    x = 524.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.