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Finding the Fourth Proportional to 996.08, 1,374.36 and 686

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Solution

The fourth proportional to 996.08, 1,374.36 and 686 is: 946.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.08 : 1,374.36 = 686 : x
  2. Step 2: Convert to fraction form
    996.08/1,374.36 = 686/x
  3. Step 3: Cross multiply
    996.08x = 1,374.36 × 686
  4. Step 4: Simplify right side
    996.08x = 942,810.96
  5. Step 5: Solve for x
    x = 942,810.96/996.08
  6. Step 6: Final answer
    x = 946.52

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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.