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Finding the Fourth Proportional to 1,961.78, 2,943.35 and 1,230.48

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Solution

The fourth proportional to 1,961.78, 2,943.35 and 1,230.48 is: 1,846.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.78 : 2,943.35 = 1,230.48 : x
  2. Step 2: Convert to fraction form
    1,961.78/2,943.35 = 1,230.48/x
  3. Step 3: Cross multiply
    1,961.78x = 2,943.35 × 1,230.48
  4. Step 4: Simplify right side
    1,961.78x = 3,621,727.16
  5. Step 5: Solve for x
    x = 3,621,727.16/1,961.78
  6. Step 6: Final answer
    x = 1,846.15

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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.