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Finding the Fourth Proportional to 659.21, 909.75 and 379.52

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Solution

The fourth proportional to 659.21, 909.75 and 379.52 is: 523.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.21 : 909.75 = 379.52 : x
  2. Step 2: Convert to fraction form
    659.21/909.75 = 379.52/x
  3. Step 3: Cross multiply
    659.21x = 909.75 × 379.52
  4. Step 4: Simplify right side
    659.21x = 345,266.47
  5. Step 5: Solve for x
    x = 345,266.47/659.21
  6. Step 6: Final answer
    x = 523.76

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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.