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Finding the Fourth Proportional to 334.64, 461.40 and 218

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Solution

The fourth proportional to 334.64, 461.40 and 218 is: 300.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.64 : 461.40 = 218 : x
  2. Step 2: Convert to fraction form
    334.64/461.40 = 218/x
  3. Step 3: Cross multiply
    334.64x = 461.40 × 218
  4. Step 4: Simplify right side
    334.64x = 100,585.20
  5. Step 5: Solve for x
    x = 100,585.20/334.64
  6. Step 6: Final answer
    x = 300.58

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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.