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Finding the Fourth Proportional to 355.11, 532.73 and 172.45

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Solution

The fourth proportional to 355.11, 532.73 and 172.45 is: 258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.11 : 532.73 = 172.45 : x
  2. Step 2: Convert to fraction form
    355.11/532.73 = 172.45/x
  3. Step 3: Cross multiply
    355.11x = 532.73 × 172.45
  4. Step 4: Simplify right side
    355.11x = 91,869.29
  5. Step 5: Solve for x
    x = 91,869.29/355.11
  6. Step 6: Final answer
    x = 258.71

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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.