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Finding the Fourth Proportional to 416.41, 624.72 and 127.84

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Solution

The fourth proportional to 416.41, 624.72 and 127.84 is: 191.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.41 : 624.72 = 127.84 : x
  2. Step 2: Convert to fraction form
    416.41/624.72 = 127.84/x
  3. Step 3: Cross multiply
    416.41x = 624.72 × 127.84
  4. Step 4: Simplify right side
    416.41x = 79,864.20
  5. Step 5: Solve for x
    x = 79,864.20/416.41
  6. Step 6: Final answer
    x = 191.79

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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.