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Finding the Fourth Proportional to 369.30, 553.67 and 239.43

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Solution

The fourth proportional to 369.30, 553.67 and 239.43 is: 358.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.30 : 553.67 = 239.43 : x
  2. Step 2: Convert to fraction form
    369.30/553.67 = 239.43/x
  3. Step 3: Cross multiply
    369.30x = 553.67 × 239.43
  4. Step 4: Simplify right side
    369.30x = 132,565.21
  5. Step 5: Solve for x
    x = 132,565.21/369.30
  6. Step 6: Final answer
    x = 358.96

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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.