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Finding the Fourth Proportional to 655.38, 981.90 and 308.34

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Solution

The fourth proportional to 655.38, 981.90 and 308.34 is: 461.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.38 : 981.90 = 308.34 : x
  2. Step 2: Convert to fraction form
    655.38/981.90 = 308.34/x
  3. Step 3: Cross multiply
    655.38x = 981.90 × 308.34
  4. Step 4: Simplify right side
    655.38x = 302,759.05
  5. Step 5: Solve for x
    x = 302,759.05/655.38
  6. Step 6: Final answer
    x = 461.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.