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Finding the Fourth Proportional to 2,131.28, 3,197.74 and 744.76

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Solution

The fourth proportional to 2,131.28, 3,197.74 and 744.76 is: 1,117.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.28 : 3,197.74 = 744.76 : x
  2. Step 2: Convert to fraction form
    2,131.28/3,197.74 = 744.76/x
  3. Step 3: Cross multiply
    2,131.28x = 3,197.74 × 744.76
  4. Step 4: Simplify right side
    2,131.28x = 2,381,548.84
  5. Step 5: Solve for x
    x = 2,381,548.84/2,131.28
  6. Step 6: Final answer
    x = 1,117.43

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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.