Home / 1,986.23-2,980.56-1,256.02

Finding the Fourth Proportional to 1,986.23, 2,980.56 and 1,256.02

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Solution

The fourth proportional to 1,986.23, 2,980.56 and 1,256.02 is: 1,884.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.23 : 2,980.56 = 1,256.02 : x
  2. Step 2: Convert to fraction form
    1,986.23/2,980.56 = 1,256.02/x
  3. Step 3: Cross multiply
    1,986.23x = 2,980.56 × 1,256.02
  4. Step 4: Simplify right side
    1,986.23x = 3,743,642.97
  5. Step 5: Solve for x
    x = 3,743,642.97/1,986.23
  6. Step 6: Final answer
    x = 1,884.80

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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.