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Finding the Fourth Proportional to 356.05, 533.87 and 173.21

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Solution

The fourth proportional to 356.05, 533.87 and 173.21 is: 259.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.05 : 533.87 = 173.21 : x
  2. Step 2: Convert to fraction form
    356.05/533.87 = 173.21/x
  3. Step 3: Cross multiply
    356.05x = 533.87 × 173.21
  4. Step 4: Simplify right side
    356.05x = 92,470.76
  5. Step 5: Solve for x
    x = 92,470.76/356.05
  6. Step 6: Final answer
    x = 259.72

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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.