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Finding the Fourth Proportional to 306.49, 459.81 and 143.99

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Solution

The fourth proportional to 306.49, 459.81 and 143.99 is: 216.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.49 : 459.81 = 143.99 : x
  2. Step 2: Convert to fraction form
    306.49/459.81 = 143.99/x
  3. Step 3: Cross multiply
    306.49x = 459.81 × 143.99
  4. Step 4: Simplify right side
    306.49x = 66,208.04
  5. Step 5: Solve for x
    x = 66,208.04/306.49
  6. Step 6: Final answer
    x = 216.02

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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.