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Finding the Fourth Proportional to 416.28, 624.54 and 123.79

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Solution

The fourth proportional to 416.28, 624.54 and 123.79 is: 185.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.28 : 624.54 = 123.79 : x
  2. Step 2: Convert to fraction form
    416.28/624.54 = 123.79/x
  3. Step 3: Cross multiply
    416.28x = 624.54 × 123.79
  4. Step 4: Simplify right side
    416.28x = 77,308.37
  5. Step 5: Solve for x
    x = 77,308.37/416.28
  6. Step 6: Final answer
    x = 185.71

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