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Finding the Fourth Proportional to 344.08, 475.24 and 311.28

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Solution

The fourth proportional to 344.08, 475.24 and 311.28 is: 429.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.08 : 475.24 = 311.28 : x
  2. Step 2: Convert to fraction form
    344.08/475.24 = 311.28/x
  3. Step 3: Cross multiply
    344.08x = 475.24 × 311.28
  4. Step 4: Simplify right side
    344.08x = 147,932.71
  5. Step 5: Solve for x
    x = 147,932.71/344.08
  6. Step 6: Final answer
    x = 429.94

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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.