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Finding the Fourth Proportional to 624.50, 936.75 and 213.63

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Solution

The fourth proportional to 624.50, 936.75 and 213.63 is: 320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.50 : 936.75 = 213.63 : x
  2. Step 2: Convert to fraction form
    624.50/936.75 = 213.63/x
  3. Step 3: Cross multiply
    624.50x = 936.75 × 213.63
  4. Step 4: Simplify right side
    624.50x = 200,117.90
  5. Step 5: Solve for x
    x = 200,117.90/624.50
  6. Step 6: Final answer
    x = 320.45

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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.