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Finding the Fourth Proportional to 505.62, 759.03 and 231.78

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Solution

The fourth proportional to 505.62, 759.03 and 231.78 is: 347.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.62 : 759.03 = 231.78 : x
  2. Step 2: Convert to fraction form
    505.62/759.03 = 231.78/x
  3. Step 3: Cross multiply
    505.62x = 759.03 × 231.78
  4. Step 4: Simplify right side
    505.62x = 175,927.97
  5. Step 5: Solve for x
    x = 175,927.97/505.62
  6. Step 6: Final answer
    x = 347.95

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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.