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Finding the Fourth Proportional to 306.33, 459.50 and 89.91

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Solution

The fourth proportional to 306.33, 459.50 and 89.91 is: 134.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.33 : 459.50 = 89.91 : x
  2. Step 2: Convert to fraction form
    306.33/459.50 = 89.91/x
  3. Step 3: Cross multiply
    306.33x = 459.50 × 89.91
  4. Step 4: Simplify right side
    306.33x = 41,313.20
  5. Step 5: Solve for x
    x = 41,313.20/306.33
  6. Step 6: Final answer
    x = 134.87

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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.