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Finding the Fourth Proportional to 624.28, 936.98 and 408.12

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Solution

The fourth proportional to 624.28, 936.98 and 408.12 is: 612.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.28 : 936.98 = 408.12 : x
  2. Step 2: Convert to fraction form
    624.28/936.98 = 408.12/x
  3. Step 3: Cross multiply
    624.28x = 936.98 × 408.12
  4. Step 4: Simplify right side
    624.28x = 382,400.28
  5. Step 5: Solve for x
    x = 382,400.28/624.28
  6. Step 6: Final answer
    x = 612.55

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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.