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Finding the Fourth Proportional to 368.80, 553.22 and 231.64

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Solution

The fourth proportional to 368.80, 553.22 and 231.64 is: 347.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.80 : 553.22 = 231.64 : x
  2. Step 2: Convert to fraction form
    368.80/553.22 = 231.64/x
  3. Step 3: Cross multiply
    368.80x = 553.22 × 231.64
  4. Step 4: Simplify right side
    368.80x = 128,147.88
  5. Step 5: Solve for x
    x = 128,147.88/368.80
  6. Step 6: Final answer
    x = 347.47

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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.