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Finding the Fourth Proportional to 618.27, 927.19 and 207.31

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Solution

The fourth proportional to 618.27, 927.19 and 207.31 is: 310.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.27 : 927.19 = 207.31 : x
  2. Step 2: Convert to fraction form
    618.27/927.19 = 207.31/x
  3. Step 3: Cross multiply
    618.27x = 927.19 × 207.31
  4. Step 4: Simplify right side
    618.27x = 192,215.76
  5. Step 5: Solve for x
    x = 192,215.76/618.27
  6. Step 6: Final answer
    x = 310.89

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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.