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Finding the Fourth Proportional to 343.22, 473.54 and 218.81

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Solution

The fourth proportional to 343.22, 473.54 and 218.81 is: 301.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.22 : 473.54 = 218.81 : x
  2. Step 2: Convert to fraction form
    343.22/473.54 = 218.81/x
  3. Step 3: Cross multiply
    343.22x = 473.54 × 218.81
  4. Step 4: Simplify right side
    343.22x = 103,615.38
  5. Step 5: Solve for x
    x = 103,615.38/343.22
  6. Step 6: Final answer
    x = 301.90

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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.