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Finding the Fourth Proportional to 2,091.45, 3,137.70 and 792.93

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Solution

The fourth proportional to 2,091.45, 3,137.70 and 792.93 is: 1,189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.45 : 3,137.70 = 792.93 : x
  2. Step 2: Convert to fraction form
    2,091.45/3,137.70 = 792.93/x
  3. Step 3: Cross multiply
    2,091.45x = 3,137.70 × 792.93
  4. Step 4: Simplify right side
    2,091.45x = 2,487,976.46
  5. Step 5: Solve for x
    x = 2,487,976.46/2,091.45
  6. Step 6: Final answer
    x = 1,189.59

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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.