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Finding the Fourth Proportional to 229.14, 342.05 and 212.01

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Solution

The fourth proportional to 229.14, 342.05 and 212.01 is: 316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.14 : 342.05 = 212.01 : x
  2. Step 2: Convert to fraction form
    229.14/342.05 = 212.01/x
  3. Step 3: Cross multiply
    229.14x = 342.05 × 212.01
  4. Step 4: Simplify right side
    229.14x = 72,516.96
  5. Step 5: Solve for x
    x = 72,516.96/229.14
  6. Step 6: Final answer
    x = 316.47

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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.