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Finding the Fourth Proportional to 306.31, 459.31 and 123.65

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Solution

The fourth proportional to 306.31, 459.31 and 123.65 is: 185.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.31 : 459.31 = 123.65 : x
  2. Step 2: Convert to fraction form
    306.31/459.31 = 123.65/x
  3. Step 3: Cross multiply
    306.31x = 459.31 × 123.65
  4. Step 4: Simplify right side
    306.31x = 56,793.68
  5. Step 5: Solve for x
    x = 56,793.68/306.31
  6. Step 6: Final answer
    x = 185.41

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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.