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Finding the Fourth Proportional to 343.11, 474.23 and 303.49

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Solution

The fourth proportional to 343.11, 474.23 and 303.49 is: 419.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.11 : 474.23 = 303.49 : x
  2. Step 2: Convert to fraction form
    343.11/474.23 = 303.49/x
  3. Step 3: Cross multiply
    343.11x = 474.23 × 303.49
  4. Step 4: Simplify right side
    343.11x = 143,923.64
  5. Step 5: Solve for x
    x = 143,923.64/343.11
  6. Step 6: Final answer
    x = 419.47

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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.