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Finding the Fourth Proportional to 2,090.64, 3,138 and 995.76

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Solution

The fourth proportional to 2,090.64, 3,138 and 995.76 is: 1,494.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,090.64 : 3,138 = 995.76 : x
  2. Step 2: Convert to fraction form
    2,090.64/3,138 = 995.76/x
  3. Step 3: Cross multiply
    2,090.64x = 3,138 × 995.76
  4. Step 4: Simplify right side
    2,090.64x = 3,124,694.88
  5. Step 5: Solve for x
    x = 3,124,694.88/2,090.64
  6. Step 6: Final answer
    x = 1,494.61

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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.