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Finding the Fourth Proportional to 343.66, 515.14 and 161.18

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Solution

The fourth proportional to 343.66, 515.14 and 161.18 is: 241.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.66 : 515.14 = 161.18 : x
  2. Step 2: Convert to fraction form
    343.66/515.14 = 161.18/x
  3. Step 3: Cross multiply
    343.66x = 515.14 × 161.18
  4. Step 4: Simplify right side
    343.66x = 83,030.27
  5. Step 5: Solve for x
    x = 83,030.27/343.66
  6. Step 6: Final answer
    x = 241.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.