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Finding the Fourth Proportional to 618.69, 927.82 and 207.72

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Solution

The fourth proportional to 618.69, 927.82 and 207.72 is: 311.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.69 : 927.82 = 207.72 : x
  2. Step 2: Convert to fraction form
    618.69/927.82 = 207.72/x
  3. Step 3: Cross multiply
    618.69x = 927.82 × 207.72
  4. Step 4: Simplify right side
    618.69x = 192,726.77
  5. Step 5: Solve for x
    x = 192,726.77/618.69
  6. Step 6: Final answer
    x = 311.51

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1.5x scale

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.