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Finding the Fourth Proportional to 330.29, 455.72 and 199.25

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Solution

The fourth proportional to 330.29, 455.72 and 199.25 is: 274.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.29 : 455.72 = 199.25 : x
  2. Step 2: Convert to fraction form
    330.29/455.72 = 199.25/x
  3. Step 3: Cross multiply
    330.29x = 455.72 × 199.25
  4. Step 4: Simplify right side
    330.29x = 90,801.21
  5. Step 5: Solve for x
    x = 90,801.21/330.29
  6. Step 6: Final answer
    x = 274.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.