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Finding the Fourth Proportional to 618.86, 854.01 and 339.09

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Solution

The fourth proportional to 618.86, 854.01 and 339.09 is: 467.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.86 : 854.01 = 339.09 : x
  2. Step 2: Convert to fraction form
    618.86/854.01 = 339.09/x
  3. Step 3: Cross multiply
    618.86x = 854.01 × 339.09
  4. Step 4: Simplify right side
    618.86x = 289,589.10
  5. Step 5: Solve for x
    x = 289,589.10/618.86
  6. Step 6: Final answer
    x = 467.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.