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Finding the Fourth Proportional to 343.15, 473.20 and 231.06

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Solution

The fourth proportional to 343.15, 473.20 and 231.06 is: 318.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.15 : 473.20 = 231.06 : x
  2. Step 2: Convert to fraction form
    343.15/473.20 = 231.06/x
  3. Step 3: Cross multiply
    343.15x = 473.20 × 231.06
  4. Step 4: Simplify right side
    343.15x = 109,338.79
  5. Step 5: Solve for x
    x = 109,338.79/343.15
  6. Step 6: Final answer
    x = 318.63

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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.