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Finding the Fourth Proportional to 306.19, 459.30 and 89.75

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Solution

The fourth proportional to 306.19, 459.30 and 89.75 is: 134.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.19 : 459.30 = 89.75 : x
  2. Step 2: Convert to fraction form
    306.19/459.30 = 89.75/x
  3. Step 3: Cross multiply
    306.19x = 459.30 × 89.75
  4. Step 4: Simplify right side
    306.19x = 41,222.18
  5. Step 5: Solve for x
    x = 41,222.18/306.19
  6. Step 6: Final answer
    x = 134.63

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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.