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Finding the Fourth Proportional to 488.06, 731.31 and 396.31

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Solution

The fourth proportional to 488.06, 731.31 and 396.31 is: 593.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.06 : 731.31 = 396.31 : x
  2. Step 2: Convert to fraction form
    488.06/731.31 = 396.31/x
  3. Step 3: Cross multiply
    488.06x = 731.31 × 396.31
  4. Step 4: Simplify right side
    488.06x = 289,825.12
  5. Step 5: Solve for x
    x = 289,825.12/488.06
  6. Step 6: Final answer
    x = 593.83

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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.