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Finding the Fourth Proportional to 659.88, 990.35 and 335.34

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Solution

The fourth proportional to 659.88, 990.35 and 335.34 is: 503.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.88 : 990.35 = 335.34 : x
  2. Step 2: Convert to fraction form
    659.88/990.35 = 335.34/x
  3. Step 3: Cross multiply
    659.88x = 990.35 × 335.34
  4. Step 4: Simplify right side
    659.88x = 332,099.02
  5. Step 5: Solve for x
    x = 332,099.02/659.88
  6. Step 6: Final answer
    x = 503.28

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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.