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Finding the Fourth Proportional to 230.88, 348.05 and 215.61

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Solution

The fourth proportional to 230.88, 348.05 and 215.61 is: 325.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.88 : 348.05 = 215.61 : x
  2. Step 2: Convert to fraction form
    230.88/348.05 = 215.61/x
  3. Step 3: Cross multiply
    230.88x = 348.05 × 215.61
  4. Step 4: Simplify right side
    230.88x = 75,043.06
  5. Step 5: Solve for x
    x = 75,043.06/230.88
  6. Step 6: Final answer
    x = 325.03

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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.