Home / 1,981.54-2,735.85-1,235.80

Finding the Fourth Proportional to 1,981.54, 2,735.85 and 1,235.80

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Solution

The fourth proportional to 1,981.54, 2,735.85 and 1,235.80 is: 1,706.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.54 : 2,735.85 = 1,235.80 : x
  2. Step 2: Convert to fraction form
    1,981.54/2,735.85 = 1,235.80/x
  3. Step 3: Cross multiply
    1,981.54x = 2,735.85 × 1,235.80
  4. Step 4: Simplify right side
    1,981.54x = 3,380,963.43
  5. Step 5: Solve for x
    x = 3,380,963.43/1,981.54
  6. Step 6: Final answer
    x = 1,706.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.