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Finding the Fourth Proportional to 306.39, 459.68 and 89.96

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Solution

The fourth proportional to 306.39, 459.68 and 89.96 is: 134.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.39 : 459.68 = 89.96 : x
  2. Step 2: Convert to fraction form
    306.39/459.68 = 89.96/x
  3. Step 3: Cross multiply
    306.39x = 459.68 × 89.96
  4. Step 4: Simplify right side
    306.39x = 41,354.59
  5. Step 5: Solve for x
    x = 41,354.59/306.39
  6. Step 6: Final answer
    x = 134.98

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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.