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Finding the Fourth Proportional to 306.68, 459.28 and 220.08

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Solution

The fourth proportional to 306.68, 459.28 and 220.08 is: 329.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.68 : 459.28 = 220.08 : x
  2. Step 2: Convert to fraction form
    306.68/459.28 = 220.08/x
  3. Step 3: Cross multiply
    306.68x = 459.28 × 220.08
  4. Step 4: Simplify right side
    306.68x = 101,078.34
  5. Step 5: Solve for x
    x = 101,078.34/306.68
  6. Step 6: Final answer
    x = 329.59

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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.