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Finding the Fourth Proportional to 343.13, 473.31 and 218.72

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Solution

The fourth proportional to 343.13, 473.31 and 218.72 is: 301.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.13 : 473.31 = 218.72 : x
  2. Step 2: Convert to fraction form
    343.13/473.31 = 218.72/x
  3. Step 3: Cross multiply
    343.13x = 473.31 × 218.72
  4. Step 4: Simplify right side
    343.13x = 103,522.36
  5. Step 5: Solve for x
    x = 103,522.36/343.13
  6. Step 6: Final answer
    x = 301.70

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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.