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Finding the Fourth Proportional to 230.72, 348.08 and 218.72

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Solution

The fourth proportional to 230.72, 348.08 and 218.72 is: 329.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.72 : 348.08 = 218.72 : x
  2. Step 2: Convert to fraction form
    230.72/348.08 = 218.72/x
  3. Step 3: Cross multiply
    230.72x = 348.08 × 218.72
  4. Step 4: Simplify right side
    230.72x = 76,132.06
  5. Step 5: Solve for x
    x = 76,132.06/230.72
  6. Step 6: Final answer
    x = 329.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.