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Finding the Fourth Proportional to 618.86, 927.74 and 481.16

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Solution

The fourth proportional to 618.86, 927.74 and 481.16 is: 721.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.86 : 927.74 = 481.16 : x
  2. Step 2: Convert to fraction form
    618.86/927.74 = 481.16/x
  3. Step 3: Cross multiply
    618.86x = 927.74 × 481.16
  4. Step 4: Simplify right side
    618.86x = 446,391.38
  5. Step 5: Solve for x
    x = 446,391.38/618.86
  6. Step 6: Final answer
    x = 721.31

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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.