Home / 1,728.87-2,576.12-1,645.18

Finding the Fourth Proportional to 1,728.87, 2,576.12 and 1,645.18

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Solution

The fourth proportional to 1,728.87, 2,576.12 and 1,645.18 is: 2,451.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.87 : 2,576.12 = 1,645.18 : x
  2. Step 2: Convert to fraction form
    1,728.87/2,576.12 = 1,645.18/x
  3. Step 3: Cross multiply
    1,728.87x = 2,576.12 × 1,645.18
  4. Step 4: Simplify right side
    1,728.87x = 4,238,181.10
  5. Step 5: Solve for x
    x = 4,238,181.10/1,728.87
  6. Step 6: Final answer
    x = 2,451.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.