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Finding the Fourth Proportional to 306.25, 459.38 and 89.83

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Solution

The fourth proportional to 306.25, 459.38 and 89.83 is: 134.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.25 : 459.38 = 89.83 : x
  2. Step 2: Convert to fraction form
    306.25/459.38 = 89.83/x
  3. Step 3: Cross multiply
    306.25x = 459.38 × 89.83
  4. Step 4: Simplify right side
    306.25x = 41,266.11
  5. Step 5: Solve for x
    x = 41,266.11/306.25
  6. Step 6: Final answer
    x = 134.75

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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.