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Finding the Fourth Proportional to 659.32, 909.81 and 379.54

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Solution

The fourth proportional to 659.32, 909.81 and 379.54 is: 523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.32 : 909.81 = 379.54 : x
  2. Step 2: Convert to fraction form
    659.32/909.81 = 379.54/x
  3. Step 3: Cross multiply
    659.32x = 909.81 × 379.54
  4. Step 4: Simplify right side
    659.32x = 345,309.29
  5. Step 5: Solve for x
    x = 345,309.29/659.32
  6. Step 6: Final answer
    x = 523.74

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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.