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Finding the Fourth Proportional to 505.14, 758.12 and 261.73

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Solution

The fourth proportional to 505.14, 758.12 and 261.73 is: 392.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.14 : 758.12 = 261.73 : x
  2. Step 2: Convert to fraction form
    505.14/758.12 = 261.73/x
  3. Step 3: Cross multiply
    505.14x = 758.12 × 261.73
  4. Step 4: Simplify right side
    505.14x = 198,422.75
  5. Step 5: Solve for x
    x = 198,422.75/505.14
  6. Step 6: Final answer
    x = 392.81

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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.