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Finding the Fourth Proportional to 355.72, 533.50 and 211.48

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Solution

The fourth proportional to 355.72, 533.50 and 211.48 is: 317.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.72 : 533.50 = 211.48 : x
  2. Step 2: Convert to fraction form
    355.72/533.50 = 211.48/x
  3. Step 3: Cross multiply
    355.72x = 533.50 × 211.48
  4. Step 4: Simplify right side
    355.72x = 112,824.58
  5. Step 5: Solve for x
    x = 112,824.58/355.72
  6. Step 6: Final answer
    x = 317.17

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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.