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Finding the Fourth Proportional to 618.70, 927.79 and 207.74

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Solution

The fourth proportional to 618.70, 927.79 and 207.74 is: 311.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.70 : 927.79 = 207.74 : x
  2. Step 2: Convert to fraction form
    618.70/927.79 = 207.74/x
  3. Step 3: Cross multiply
    618.70x = 927.79 × 207.74
  4. Step 4: Simplify right side
    618.70x = 192,733.94
  5. Step 5: Solve for x
    x = 192,733.94/618.70
  6. Step 6: Final answer
    x = 311.52

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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.