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Finding the Fourth Proportional to 1,906.92, 2,630.75 and 1,243.75

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Solution

The fourth proportional to 1,906.92, 2,630.75 and 1,243.75 is: 1,715.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.92 : 2,630.75 = 1,243.75 : x
  2. Step 2: Convert to fraction form
    1,906.92/2,630.75 = 1,243.75/x
  3. Step 3: Cross multiply
    1,906.92x = 2,630.75 × 1,243.75
  4. Step 4: Simplify right side
    1,906.92x = 3,271,994.45
  5. Step 5: Solve for x
    x = 3,271,994.45/1,906.92
  6. Step 6: Final answer
    x = 1,715.85

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1.5x scale

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.