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Finding the Fourth Proportional to 355.80, 533.22 and 201.66

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Solution

The fourth proportional to 355.80, 533.22 and 201.66 is: 302.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.80 : 533.22 = 201.66 : x
  2. Step 2: Convert to fraction form
    355.80/533.22 = 201.66/x
  3. Step 3: Cross multiply
    355.80x = 533.22 × 201.66
  4. Step 4: Simplify right side
    355.80x = 107,529.15
  5. Step 5: Solve for x
    x = 107,529.15/355.80
  6. Step 6: Final answer
    x = 302.22

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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.