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Finding the Fourth Proportional to 618.31, 853.24 and 356.32

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Solution

The fourth proportional to 618.31, 853.24 and 356.32 is: 491.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.31 : 853.24 = 356.32 : x
  2. Step 2: Convert to fraction form
    618.31/853.24 = 356.32/x
  3. Step 3: Cross multiply
    618.31x = 853.24 × 356.32
  4. Step 4: Simplify right side
    618.31x = 304,026.48
  5. Step 5: Solve for x
    x = 304,026.48/618.31
  6. Step 6: Final answer
    x = 491.71

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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.