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Finding the Fourth Proportional to 2,157.75, 3,236.69 and 697.05

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Solution

The fourth proportional to 2,157.75, 3,236.69 and 697.05 is: 1,045.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.75 : 3,236.69 = 697.05 : x
  2. Step 2: Convert to fraction form
    2,157.75/3,236.69 = 697.05/x
  3. Step 3: Cross multiply
    2,157.75x = 3,236.69 × 697.05
  4. Step 4: Simplify right side
    2,157.75x = 2,256,131.28
  5. Step 5: Solve for x
    x = 2,256,131.28/2,157.75
  6. Step 6: Final answer
    x = 1,045.59

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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.