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Finding the Fourth Proportional to 306.36, 459.36 and 143.94

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Solution

The fourth proportional to 306.36, 459.36 and 143.94 is: 215.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.36 : 459.36 = 143.94 : x
  2. Step 2: Convert to fraction form
    306.36/459.36 = 143.94/x
  3. Step 3: Cross multiply
    306.36x = 459.36 × 143.94
  4. Step 4: Simplify right side
    306.36x = 66,120.28
  5. Step 5: Solve for x
    x = 66,120.28/306.36
  6. Step 6: Final answer
    x = 215.83

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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.