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Finding the Fourth Proportional to 624.38, 936.54 and 379.22

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Solution

The fourth proportional to 624.38, 936.54 and 379.22 is: 568.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.38 : 936.54 = 379.22 : x
  2. Step 2: Convert to fraction form
    624.38/936.54 = 379.22/x
  3. Step 3: Cross multiply
    624.38x = 936.54 × 379.22
  4. Step 4: Simplify right side
    624.38x = 355,150.02
  5. Step 5: Solve for x
    x = 355,150.02/624.38
  6. Step 6: Final answer
    x = 568.81

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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.