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Finding the Fourth Proportional to 477.97, 659.69 and 330.79

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Solution

The fourth proportional to 477.97, 659.69 and 330.79 is: 456.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.97 : 659.69 = 330.79 : x
  2. Step 2: Convert to fraction form
    477.97/659.69 = 330.79/x
  3. Step 3: Cross multiply
    477.97x = 659.69 × 330.79
  4. Step 4: Simplify right side
    477.97x = 218,217.20
  5. Step 5: Solve for x
    x = 218,217.20/477.97
  6. Step 6: Final answer
    x = 456.55

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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.