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Finding the Fourth Proportional to 356.25, 492.03 and 239.61

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Solution

The fourth proportional to 356.25, 492.03 and 239.61 is: 330.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.25 : 492.03 = 239.61 : x
  2. Step 2: Convert to fraction form
    356.25/492.03 = 239.61/x
  3. Step 3: Cross multiply
    356.25x = 492.03 × 239.61
  4. Step 4: Simplify right side
    356.25x = 117,895.31
  5. Step 5: Solve for x
    x = 117,895.31/356.25
  6. Step 6: Final answer
    x = 330.93

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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.