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Finding the Fourth Proportional to 305.10, 421.02 and 227.34

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Solution

The fourth proportional to 305.10, 421.02 and 227.34 is: 313.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.10 : 421.02 = 227.34 : x
  2. Step 2: Convert to fraction form
    305.10/421.02 = 227.34/x
  3. Step 3: Cross multiply
    305.10x = 421.02 × 227.34
  4. Step 4: Simplify right side
    305.10x = 95,714.69
  5. Step 5: Solve for x
    x = 95,714.69/305.10
  6. Step 6: Final answer
    x = 313.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.