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Finding the Fourth Proportional to 306.30, 459.44 and 75.18

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Solution

The fourth proportional to 306.30, 459.44 and 75.18 is: 112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.30 : 459.44 = 75.18 : x
  2. Step 2: Convert to fraction form
    306.30/459.44 = 75.18/x
  3. Step 3: Cross multiply
    306.30x = 459.44 × 75.18
  4. Step 4: Simplify right side
    306.30x = 34,539.74
  5. Step 5: Solve for x
    x = 34,539.74/306.30
  6. Step 6: Final answer
    x = 112.76

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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.