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Finding the Fourth Proportional to 369.63, 553.41 and 239.78

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Solution

The fourth proportional to 369.63, 553.41 and 239.78 is: 359.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.63 : 553.41 = 239.78 : x
  2. Step 2: Convert to fraction form
    369.63/553.41 = 239.78/x
  3. Step 3: Cross multiply
    369.63x = 553.41 × 239.78
  4. Step 4: Simplify right side
    369.63x = 132,693.88
  5. Step 5: Solve for x
    x = 132,693.88/369.63
  6. Step 6: Final answer
    x = 359.00

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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.