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Finding the Fourth Proportional to 618.74, 927.95 and 207.86

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Solution

The fourth proportional to 618.74, 927.95 and 207.86 is: 311.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.74 : 927.95 = 207.86 : x
  2. Step 2: Convert to fraction form
    618.74/927.95 = 207.86/x
  3. Step 3: Cross multiply
    618.74x = 927.95 × 207.86
  4. Step 4: Simplify right side
    618.74x = 192,882.65
  5. Step 5: Solve for x
    x = 192,882.65/618.74
  6. Step 6: Final answer
    x = 311.74

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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.