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Finding the Fourth Proportional to 436.70, 655.38 and 193.38

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Solution

The fourth proportional to 436.70, 655.38 and 193.38 is: 290.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.70 : 655.38 = 193.38 : x
  2. Step 2: Convert to fraction form
    436.70/655.38 = 193.38/x
  3. Step 3: Cross multiply
    436.70x = 655.38 × 193.38
  4. Step 4: Simplify right side
    436.70x = 126,737.38
  5. Step 5: Solve for x
    x = 126,737.38/436.70
  6. Step 6: Final answer
    x = 290.22

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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.