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Finding the Fourth Proportional to 996.18, 1,493.91 and 411.16

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Solution

The fourth proportional to 996.18, 1,493.91 and 411.16 is: 616.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.18 : 1,493.91 = 411.16 : x
  2. Step 2: Convert to fraction form
    996.18/1,493.91 = 411.16/x
  3. Step 3: Cross multiply
    996.18x = 1,493.91 × 411.16
  4. Step 4: Simplify right side
    996.18x = 614,228.57
  5. Step 5: Solve for x
    x = 614,228.57/996.18
  6. Step 6: Final answer
    x = 616.58

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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.