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Finding the Fourth Proportional to 343.44, 512.46 and 289.44

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Solution

The fourth proportional to 343.44, 512.46 and 289.44 is: 431.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.44 : 512.46 = 289.44 : x
  2. Step 2: Convert to fraction form
    343.44/512.46 = 289.44/x
  3. Step 3: Cross multiply
    343.44x = 512.46 × 289.44
  4. Step 4: Simplify right side
    343.44x = 148,326.42
  5. Step 5: Solve for x
    x = 148,326.42/343.44
  6. Step 6: Final answer
    x = 431.88

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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.