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Finding the Fourth Proportional to 1,994.92, 2,992.38 and 696.40

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Solution

The fourth proportional to 1,994.92, 2,992.38 and 696.40 is: 1,044.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.92 : 2,992.38 = 696.40 : x
  2. Step 2: Convert to fraction form
    1,994.92/2,992.38 = 696.40/x
  3. Step 3: Cross multiply
    1,994.92x = 2,992.38 × 696.40
  4. Step 4: Simplify right side
    1,994.92x = 2,083,893.43
  5. Step 5: Solve for x
    x = 2,083,893.43/1,994.92
  6. Step 6: Final answer
    x = 1,044.60

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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.