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Finding the Fourth Proportional to 624.31, 936.16 and 213.33

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Solution

The fourth proportional to 624.31, 936.16 and 213.33 is: 319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.31 : 936.16 = 213.33 : x
  2. Step 2: Convert to fraction form
    624.31/936.16 = 213.33/x
  3. Step 3: Cross multiply
    624.31x = 936.16 × 213.33
  4. Step 4: Simplify right side
    624.31x = 199,713.99
  5. Step 5: Solve for x
    x = 199,713.99/624.31
  6. Step 6: Final answer
    x = 319.90

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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.