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Finding the Fourth Proportional to 330.93, 456.64 and 199.89

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Solution

The fourth proportional to 330.93, 456.64 and 199.89 is: 275.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.93 : 456.64 = 199.89 : x
  2. Step 2: Convert to fraction form
    330.93/456.64 = 199.89/x
  3. Step 3: Cross multiply
    330.93x = 456.64 × 199.89
  4. Step 4: Simplify right side
    330.93x = 91,277.27
  5. Step 5: Solve for x
    x = 91,277.27/330.93
  6. Step 6: Final answer
    x = 275.82

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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.