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Finding the Fourth Proportional to 306.93, 459.48 and 255.11

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Solution

The fourth proportional to 306.93, 459.48 and 255.11 is: 381.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.93 : 459.48 = 255.11 : x
  2. Step 2: Convert to fraction form
    306.93/459.48 = 255.11/x
  3. Step 3: Cross multiply
    306.93x = 459.48 × 255.11
  4. Step 4: Simplify right side
    306.93x = 117,215.65
  5. Step 5: Solve for x
    x = 117,215.65/306.93
  6. Step 6: Final answer
    x = 381.90

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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.