Home / 1,394.97-2,087.12-1,220.36

Finding the Fourth Proportional to 1,394.97, 2,087.12 and 1,220.36

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Solution

The fourth proportional to 1,394.97, 2,087.12 and 1,220.36 is: 1,825.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.97 : 2,087.12 = 1,220.36 : x
  2. Step 2: Convert to fraction form
    1,394.97/2,087.12 = 1,220.36/x
  3. Step 3: Cross multiply
    1,394.97x = 2,087.12 × 1,220.36
  4. Step 4: Simplify right side
    1,394.97x = 2,547,021.23
  5. Step 5: Solve for x
    x = 2,547,021.23/1,394.97
  6. Step 6: Final answer
    x = 1,825.86

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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.