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Finding the Fourth Proportional to 618.20, 927.47 and 228.39

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Solution

The fourth proportional to 618.20, 927.47 and 228.39 is: 342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.20 : 927.47 = 228.39 : x
  2. Step 2: Convert to fraction form
    618.20/927.47 = 228.39/x
  3. Step 3: Cross multiply
    618.20x = 927.47 × 228.39
  4. Step 4: Simplify right side
    618.20x = 211,821.65
  5. Step 5: Solve for x
    x = 211,821.65/618.20
  6. Step 6: Final answer
    x = 342.64

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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.