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Finding the Fourth Proportional to 657.91, 908.22 and 395.88

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Solution

The fourth proportional to 657.91, 908.22 and 395.88 is: 546.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.91 : 908.22 = 395.88 : x
  2. Step 2: Convert to fraction form
    657.91/908.22 = 395.88/x
  3. Step 3: Cross multiply
    657.91x = 908.22 × 395.88
  4. Step 4: Simplify right side
    657.91x = 359,546.13
  5. Step 5: Solve for x
    x = 359,546.13/657.91
  6. Step 6: Final answer
    x = 546.50

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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.