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Finding the Fourth Proportional to 230.48, 344.34 and 215.30

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Solution

The fourth proportional to 230.48, 344.34 and 215.30 is: 321.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.48 : 344.34 = 215.30 : x
  2. Step 2: Convert to fraction form
    230.48/344.34 = 215.30/x
  3. Step 3: Cross multiply
    230.48x = 344.34 × 215.30
  4. Step 4: Simplify right side
    230.48x = 74,136.40
  5. Step 5: Solve for x
    x = 74,136.40/230.48
  6. Step 6: Final answer
    x = 321.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.