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Finding the Fourth Proportional to 659.97, 990 and 335.16

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Solution

The fourth proportional to 659.97, 990 and 335.16 is: 502.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.97 : 990 = 335.16 : x
  2. Step 2: Convert to fraction form
    659.97/990 = 335.16/x
  3. Step 3: Cross multiply
    659.97x = 990 × 335.16
  4. Step 4: Simplify right side
    659.97x = 331,808.40
  5. Step 5: Solve for x
    x = 331,808.40/659.97
  6. Step 6: Final answer
    x = 502.76

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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.