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Finding the Fourth Proportional to 659.87, 988.99 and 335.33

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Solution

The fourth proportional to 659.87, 988.99 and 335.33 is: 502.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.87 : 988.99 = 335.33 : x
  2. Step 2: Convert to fraction form
    659.87/988.99 = 335.33/x
  3. Step 3: Cross multiply
    659.87x = 988.99 × 335.33
  4. Step 4: Simplify right side
    659.87x = 331,638.02
  5. Step 5: Solve for x
    x = 331,638.02/659.87
  6. Step 6: Final answer
    x = 502.58

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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.