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Finding the Fourth Proportional to 623.73, 935.42 and 212.64

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Solution

The fourth proportional to 623.73, 935.42 and 212.64 is: 318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.73 : 935.42 = 212.64 : x
  2. Step 2: Convert to fraction form
    623.73/935.42 = 212.64/x
  3. Step 3: Cross multiply
    623.73x = 935.42 × 212.64
  4. Step 4: Simplify right side
    623.73x = 198,906.65
  5. Step 5: Solve for x
    x = 198,906.65/623.73
  6. Step 6: Final answer
    x = 318.90

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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.