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Finding the Fourth Proportional to 912.31, 1,367.66 and 335.05

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Solution

The fourth proportional to 912.31, 1,367.66 and 335.05 is: 502.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.31 : 1,367.66 = 335.05 : x
  2. Step 2: Convert to fraction form
    912.31/1,367.66 = 335.05/x
  3. Step 3: Cross multiply
    912.31x = 1,367.66 × 335.05
  4. Step 4: Simplify right side
    912.31x = 458,234.52
  5. Step 5: Solve for x
    x = 458,234.52/912.31
  6. Step 6: Final answer
    x = 502.28

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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.