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Finding the Fourth Proportional to 369, 553.63 and 231.89

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Solution

The fourth proportional to 369, 553.63 and 231.89 is: 347.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    369 : 553.63 = 231.89 : x
  2. Step 2: Convert to fraction form
    369/553.63 = 231.89/x
  3. Step 3: Cross multiply
    369x = 553.63 × 231.89
  4. Step 4: Simplify right side
    369x = 128,380.10
  5. Step 5: Solve for x
    x = 128,380.10/369
  6. Step 6: Final answer
    x = 347.91

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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.