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Finding the Fourth Proportional to 1,825.10, 2,733.60 and 728.90

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Solution

The fourth proportional to 1,825.10, 2,733.60 and 728.90 is: 1,091.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,825.10 : 2,733.60 = 728.90 : x
  2. Step 2: Convert to fraction form
    1,825.10/2,733.60 = 728.90/x
  3. Step 3: Cross multiply
    1,825.10x = 2,733.60 × 728.90
  4. Step 4: Simplify right side
    1,825.10x = 1,992,521.04
  5. Step 5: Solve for x
    x = 1,992,521.04/1,825.10
  6. Step 6: Final answer
    x = 1,091.73

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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.