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Finding the Fourth Proportional to 306.53, 459.78 and 144.17

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Solution

The fourth proportional to 306.53, 459.78 and 144.17 is: 216.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.53 : 459.78 = 144.17 : x
  2. Step 2: Convert to fraction form
    306.53/459.78 = 144.17/x
  3. Step 3: Cross multiply
    306.53x = 459.78 × 144.17
  4. Step 4: Simplify right side
    306.53x = 66,286.48
  5. Step 5: Solve for x
    x = 66,286.48/306.53
  6. Step 6: Final answer
    x = 216.25

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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.