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Finding the Fourth Proportional to 659.88, 990.27 and 335.46

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Solution

The fourth proportional to 659.88, 990.27 and 335.46 is: 503.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.88 : 990.27 = 335.46 : x
  2. Step 2: Convert to fraction form
    659.88/990.27 = 335.46/x
  3. Step 3: Cross multiply
    659.88x = 990.27 × 335.46
  4. Step 4: Simplify right side
    659.88x = 332,195.97
  5. Step 5: Solve for x
    x = 332,195.97/659.88
  6. Step 6: Final answer
    x = 503.42

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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.