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Finding the Fourth Proportional to 659.25, 909.68 and 379.38

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Solution

The fourth proportional to 659.25, 909.68 and 379.38 is: 523.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.25 : 909.68 = 379.38 : x
  2. Step 2: Convert to fraction form
    659.25/909.68 = 379.38/x
  3. Step 3: Cross multiply
    659.25x = 909.68 × 379.38
  4. Step 4: Simplify right side
    659.25x = 345,112.50
  5. Step 5: Solve for x
    x = 345,112.50/659.25
  6. Step 6: Final answer
    x = 523.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.