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Finding the Fourth Proportional to 3,919.78, 5,881.08 and 1,728.25

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Solution

The fourth proportional to 3,919.78, 5,881.08 and 1,728.25 is: 2,593.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.78 : 5,881.08 = 1,728.25 : x
  2. Step 2: Convert to fraction form
    3,919.78/5,881.08 = 1,728.25/x
  3. Step 3: Cross multiply
    3,919.78x = 5,881.08 × 1,728.25
  4. Step 4: Simplify right side
    3,919.78x = 10,163,976.51
  5. Step 5: Solve for x
    x = 10,163,976.51/3,919.78
  6. Step 6: Final answer
    x = 2,593.00

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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.