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Finding the Fourth Proportional to 230.30, 318.30 and 220.50

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Solution

The fourth proportional to 230.30, 318.30 and 220.50 is: 304.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.30 : 318.30 = 220.50 : x
  2. Step 2: Convert to fraction form
    230.30/318.30 = 220.50/x
  3. Step 3: Cross multiply
    230.30x = 318.30 × 220.50
  4. Step 4: Simplify right side
    230.30x = 70,185.15
  5. Step 5: Solve for x
    x = 70,185.15/230.30
  6. Step 6: Final answer
    x = 304.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.