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Finding the Fourth Proportional to 436.11, 654 and 127.88

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Solution

The fourth proportional to 436.11, 654 and 127.88 is: 191.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.11 : 654 = 127.88 : x
  2. Step 2: Convert to fraction form
    436.11/654 = 127.88/x
  3. Step 3: Cross multiply
    436.11x = 654 × 127.88
  4. Step 4: Simplify right side
    436.11x = 83,630.25
  5. Step 5: Solve for x
    x = 83,630.25/436.11
  6. Step 6: Final answer
    x = 191.76

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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.