Home / 1,869.97-2,801.77-1,321.10

Finding the Fourth Proportional to 1,869.97, 2,801.77 and 1,321.10

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Solution

The fourth proportional to 1,869.97, 2,801.77 and 1,321.10 is: 1,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.97 : 2,801.77 = 1,321.10 : x
  2. Step 2: Convert to fraction form
    1,869.97/2,801.77 = 1,321.10/x
  3. Step 3: Cross multiply
    1,869.97x = 2,801.77 × 1,321.10
  4. Step 4: Simplify right side
    1,869.97x = 3,701,418.35
  5. Step 5: Solve for x
    x = 3,701,418.35/1,869.97
  6. Step 6: Final answer
    x = 1,979.40

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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.