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Finding the Fourth Proportional to 355.32, 532.80 and 172.53

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Solution

The fourth proportional to 355.32, 532.80 and 172.53 is: 258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.32 : 532.80 = 172.53 : x
  2. Step 2: Convert to fraction form
    355.32/532.80 = 172.53/x
  3. Step 3: Cross multiply
    355.32x = 532.80 × 172.53
  4. Step 4: Simplify right side
    355.32x = 91,923.98
  5. Step 5: Solve for x
    x = 91,923.98/355.32
  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.