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Finding the Fourth Proportional to 659.36, 988.69 and 329.94

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Solution

The fourth proportional to 659.36, 988.69 and 329.94 is: 494.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.36 : 988.69 = 329.94 : x
  2. Step 2: Convert to fraction form
    659.36/988.69 = 329.94/x
  3. Step 3: Cross multiply
    659.36x = 988.69 × 329.94
  4. Step 4: Simplify right side
    659.36x = 326,209.20
  5. Step 5: Solve for x
    x = 326,209.20/659.36
  6. Step 6: Final answer
    x = 494.74

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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.