Home / 1,908.48-2,860.32-1,087.20

Finding the Fourth Proportional to 1,908.48, 2,860.32 and 1,087.20

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Solution

The fourth proportional to 1,908.48, 2,860.32 and 1,087.20 is: 1,629.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.48 : 2,860.32 = 1,087.20 : x
  2. Step 2: Convert to fraction form
    1,908.48/2,860.32 = 1,087.20/x
  3. Step 3: Cross multiply
    1,908.48x = 2,860.32 × 1,087.20
  4. Step 4: Simplify right side
    1,908.48x = 3,109,739.90
  5. Step 5: Solve for x
    x = 3,109,739.90/1,908.48
  6. Step 6: Final answer
    x = 1,629.43

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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.