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Finding the Fourth Proportional to 229.26, 342.21 and 215.04

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Solution

The fourth proportional to 229.26, 342.21 and 215.04 is: 320.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.26 : 342.21 = 215.04 : x
  2. Step 2: Convert to fraction form
    229.26/342.21 = 215.04/x
  3. Step 3: Cross multiply
    229.26x = 342.21 × 215.04
  4. Step 4: Simplify right side
    229.26x = 73,588.84
  5. Step 5: Solve for x
    x = 73,588.84/229.26
  6. Step 6: Final answer
    x = 320.98

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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.