Home / 2,642.75-3,977.39-1,988.02

Finding the Fourth Proportional to 2,642.75, 3,977.39 and 1,988.02

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Solution

The fourth proportional to 2,642.75, 3,977.39 and 1,988.02 is: 2,992.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.75 : 3,977.39 = 1,988.02 : x
  2. Step 2: Convert to fraction form
    2,642.75/3,977.39 = 1,988.02/x
  3. Step 3: Cross multiply
    2,642.75x = 3,977.39 × 1,988.02
  4. Step 4: Simplify right side
    2,642.75x = 7,907,110.98
  5. Step 5: Solve for x
    x = 7,907,110.98/2,642.75
  6. Step 6: Final answer
    x = 2,992.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.