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Finding the Fourth Proportional to 658.84, 909.38 and 379.11

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Solution

The fourth proportional to 658.84, 909.38 and 379.11 is: 523.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.84 : 909.38 = 379.11 : x
  2. Step 2: Convert to fraction form
    658.84/909.38 = 379.11/x
  3. Step 3: Cross multiply
    658.84x = 909.38 × 379.11
  4. Step 4: Simplify right side
    658.84x = 344,749.60
  5. Step 5: Solve for x
    x = 344,749.60/658.84
  6. Step 6: Final answer
    x = 523.27

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1.5x scale

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.