Home / 1,988.71-2,745.68-1,360.28

Finding the Fourth Proportional to 1,988.71, 2,745.68 and 1,360.28

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Solution

The fourth proportional to 1,988.71, 2,745.68 and 1,360.28 is: 1,878.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.71 : 2,745.68 = 1,360.28 : x
  2. Step 2: Convert to fraction form
    1,988.71/2,745.68 = 1,360.28/x
  3. Step 3: Cross multiply
    1,988.71x = 2,745.68 × 1,360.28
  4. Step 4: Simplify right side
    1,988.71x = 3,734,893.59
  5. Step 5: Solve for x
    x = 3,734,893.59/1,988.71
  6. Step 6: Final answer
    x = 1,878.05

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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.