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Finding the Fourth Proportional to 1,820.44, 2,729.58 and 725.32

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Solution

The fourth proportional to 1,820.44, 2,729.58 and 725.32 is: 1,087.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.44 : 2,729.58 = 725.32 : x
  2. Step 2: Convert to fraction form
    1,820.44/2,729.58 = 725.32/x
  3. Step 3: Cross multiply
    1,820.44x = 2,729.58 × 725.32
  4. Step 4: Simplify right side
    1,820.44x = 1,979,818.97
  5. Step 5: Solve for x
    x = 1,979,818.97/1,820.44
  6. Step 6: Final answer
    x = 1,087.55

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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.