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Finding the Fourth Proportional to 996.31, 1,494.47 and 411.64

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Solution

The fourth proportional to 996.31, 1,494.47 and 411.64 is: 617.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.31 : 1,494.47 = 411.64 : x
  2. Step 2: Convert to fraction form
    996.31/1,494.47 = 411.64/x
  3. Step 3: Cross multiply
    996.31x = 1,494.47 × 411.64
  4. Step 4: Simplify right side
    996.31x = 615,187.01
  5. Step 5: Solve for x
    x = 615,187.01/996.31
  6. Step 6: Final answer
    x = 617.46

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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.