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Finding the Fourth Proportional to 661.20, 908.22 and 657.96

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Solution

The fourth proportional to 661.20, 908.22 and 657.96 is: 903.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.20 : 908.22 = 657.96 : x
  2. Step 2: Convert to fraction form
    661.20/908.22 = 657.96/x
  3. Step 3: Cross multiply
    661.20x = 908.22 × 657.96
  4. Step 4: Simplify right side
    661.20x = 597,572.43
  5. Step 5: Solve for x
    x = 597,572.43/661.20
  6. Step 6: Final answer
    x = 903.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.