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Finding the Fourth Proportional to 618.24, 853.18 and 338.47

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Solution

The fourth proportional to 618.24, 853.18 and 338.47 is: 467.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.24 : 853.18 = 338.47 : x
  2. Step 2: Convert to fraction form
    618.24/853.18 = 338.47/x
  3. Step 3: Cross multiply
    618.24x = 853.18 × 338.47
  4. Step 4: Simplify right side
    618.24x = 288,775.83
  5. Step 5: Solve for x
    x = 288,775.83/618.24
  6. Step 6: Final answer
    x = 467.09

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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.