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Finding the Fourth Proportional to 658.09, 908.08 and 378.30

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Solution

The fourth proportional to 658.09, 908.08 and 378.30 is: 522.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.09 : 908.08 = 378.30 : x
  2. Step 2: Convert to fraction form
    658.09/908.08 = 378.30/x
  3. Step 3: Cross multiply
    658.09x = 908.08 × 378.30
  4. Step 4: Simplify right side
    658.09x = 343,526.66
  5. Step 5: Solve for x
    x = 343,526.66/658.09
  6. Step 6: Final answer
    x = 522.01

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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.