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Finding the Fourth Proportional to 330.36, 455.87 and 199.35

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Solution

The fourth proportional to 330.36, 455.87 and 199.35 is: 275.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.36 : 455.87 = 199.35 : x
  2. Step 2: Convert to fraction form
    330.36/455.87 = 199.35/x
  3. Step 3: Cross multiply
    330.36x = 455.87 × 199.35
  4. Step 4: Simplify right side
    330.36x = 90,876.69
  5. Step 5: Solve for x
    x = 90,876.69/330.36
  6. Step 6: Final answer
    x = 275.08

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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.