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Finding the Fourth Proportional to 2,578.60, 3,867.40 and 729.27

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Solution

The fourth proportional to 2,578.60, 3,867.40 and 729.27 is: 1,093.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.60 : 3,867.40 = 729.27 : x
  2. Step 2: Convert to fraction form
    2,578.60/3,867.40 = 729.27/x
  3. Step 3: Cross multiply
    2,578.60x = 3,867.40 × 729.27
  4. Step 4: Simplify right side
    2,578.60x = 2,820,361.28
  5. Step 5: Solve for x
    x = 2,820,361.28/2,578.60
  6. Step 6: Final answer
    x = 1,093.76

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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.