Home / 1,681.09-2,519.37-1,390.43

Finding the Fourth Proportional to 1,681.09, 2,519.37 and 1,390.43

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Solution

The fourth proportional to 1,681.09, 2,519.37 and 1,390.43 is: 2,083.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.09 : 2,519.37 = 1,390.43 : x
  2. Step 2: Convert to fraction form
    1,681.09/2,519.37 = 1,390.43/x
  3. Step 3: Cross multiply
    1,681.09x = 2,519.37 × 1,390.43
  4. Step 4: Simplify right side
    1,681.09x = 3,503,013.93
  5. Step 5: Solve for x
    x = 3,503,013.93/1,681.09
  6. Step 6: Final answer
    x = 2,083.78

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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.