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Finding the Fourth Proportional to 2,157.97, 3,236.25 and 696.78

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Solution

The fourth proportional to 2,157.97, 3,236.25 and 696.78 is: 1,044.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.97 : 3,236.25 = 696.78 : x
  2. Step 2: Convert to fraction form
    2,157.97/3,236.25 = 696.78/x
  3. Step 3: Cross multiply
    2,157.97x = 3,236.25 × 696.78
  4. Step 4: Simplify right side
    2,157.97x = 2,254,954.28
  5. Step 5: Solve for x
    x = 2,254,954.28/2,157.97
  6. Step 6: Final answer
    x = 1,044.94

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1.5x scale

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.