Home / 1,980.69-2,732.26-1,272.64

Finding the Fourth Proportional to 1,980.69, 2,732.26 and 1,272.64

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Solution

The fourth proportional to 1,980.69, 2,732.26 and 1,272.64 is: 1,755.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.69 : 2,732.26 = 1,272.64 : x
  2. Step 2: Convert to fraction form
    1,980.69/2,732.26 = 1,272.64/x
  3. Step 3: Cross multiply
    1,980.69x = 2,732.26 × 1,272.64
  4. Step 4: Simplify right side
    1,980.69x = 3,477,180.18
  5. Step 5: Solve for x
    x = 3,477,180.18/1,980.69
  6. Step 6: Final answer
    x = 1,755.54

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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.