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Finding the Fourth Proportional to 340.73, 470.21 and 193.39

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Solution

The fourth proportional to 340.73, 470.21 and 193.39 is: 266.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.73 : 470.21 = 193.39 : x
  2. Step 2: Convert to fraction form
    340.73/470.21 = 193.39/x
  3. Step 3: Cross multiply
    340.73x = 470.21 × 193.39
  4. Step 4: Simplify right side
    340.73x = 90,933.91
  5. Step 5: Solve for x
    x = 90,933.91/340.73
  6. Step 6: Final answer
    x = 266.88

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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.