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Finding the Fourth Proportional to 334.21, 461.28 and 216.31

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Solution

The fourth proportional to 334.21, 461.28 and 216.31 is: 298.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.21 : 461.28 = 216.31 : x
  2. Step 2: Convert to fraction form
    334.21/461.28 = 216.31/x
  3. Step 3: Cross multiply
    334.21x = 461.28 × 216.31
  4. Step 4: Simplify right side
    334.21x = 99,779.48
  5. Step 5: Solve for x
    x = 99,779.48/334.21
  6. Step 6: Final answer
    x = 298.55

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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.