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Finding the Fourth Proportional to 355.56, 533.28 and 201.68

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Solution

The fourth proportional to 355.56, 533.28 and 201.68 is: 302.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.56 : 533.28 = 201.68 : x
  2. Step 2: Convert to fraction form
    355.56/533.28 = 201.68/x
  3. Step 3: Cross multiply
    355.56x = 533.28 × 201.68
  4. Step 4: Simplify right side
    355.56x = 107,551.91
  5. Step 5: Solve for x
    x = 107,551.91/355.56
  6. Step 6: Final answer
    x = 302.49

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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.