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Finding the Fourth Proportional to 342.80, 473.11 and 218.33

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Solution

The fourth proportional to 342.80, 473.11 and 218.33 is: 301.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.80 : 473.11 = 218.33 : x
  2. Step 2: Convert to fraction form
    342.80/473.11 = 218.33/x
  3. Step 3: Cross multiply
    342.80x = 473.11 × 218.33
  4. Step 4: Simplify right side
    342.80x = 103,292.29
  5. Step 5: Solve for x
    x = 103,292.29/342.80
  6. Step 6: Final answer
    x = 301.32

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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.