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Finding the Fourth Proportional to 369.02, 553.46 and 231.89

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Solution

The fourth proportional to 369.02, 553.46 and 231.89 is: 347.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.02 : 553.46 = 231.89 : x
  2. Step 2: Convert to fraction form
    369.02/553.46 = 231.89/x
  3. Step 3: Cross multiply
    369.02x = 553.46 × 231.89
  4. Step 4: Simplify right side
    369.02x = 128,337.91
  5. Step 5: Solve for x
    x = 128,337.91/369.02
  6. Step 6: Final answer
    x = 347.78

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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.