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Finding the Fourth Proportional to 624.12, 936.04 and 213.18

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Solution

The fourth proportional to 624.12, 936.04 and 213.18 is: 319.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.12 : 936.04 = 213.18 : x
  2. Step 2: Convert to fraction form
    624.12/936.04 = 213.18/x
  3. Step 3: Cross multiply
    624.12x = 936.04 × 213.18
  4. Step 4: Simplify right side
    624.12x = 199,545.01
  5. Step 5: Solve for x
    x = 199,545.01/624.12
  6. Step 6: Final answer
    x = 319.72

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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.