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Finding the Fourth Proportional to 614.12, 921.20 and 229.36

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Solution

The fourth proportional to 614.12, 921.20 and 229.36 is: 344.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.12 : 921.20 = 229.36 : x
  2. Step 2: Convert to fraction form
    614.12/921.20 = 229.36/x
  3. Step 3: Cross multiply
    614.12x = 921.20 × 229.36
  4. Step 4: Simplify right side
    614.12x = 211,286.43
  5. Step 5: Solve for x
    x = 211,286.43/614.12
  6. Step 6: Final answer
    x = 344.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.