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Finding the Fourth Proportional to 334.71, 461.30 and 319.19

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Solution

The fourth proportional to 334.71, 461.30 and 319.19 is: 439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.71 : 461.30 = 319.19 : x
  2. Step 2: Convert to fraction form
    334.71/461.30 = 319.19/x
  3. Step 3: Cross multiply
    334.71x = 461.30 × 319.19
  4. Step 4: Simplify right side
    334.71x = 147,238.44
  5. Step 5: Solve for x
    x = 147,238.44/334.71
  6. Step 6: Final answer
    x = 439.90

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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.