Home / 1,969.23-2,718.48-1,223.69

Finding the Fourth Proportional to 1,969.23, 2,718.48 and 1,223.69

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Solution

The fourth proportional to 1,969.23, 2,718.48 and 1,223.69 is: 1,689.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.23 : 2,718.48 = 1,223.69 : x
  2. Step 2: Convert to fraction form
    1,969.23/2,718.48 = 1,223.69/x
  3. Step 3: Cross multiply
    1,969.23x = 2,718.48 × 1,223.69
  4. Step 4: Simplify right side
    1,969.23x = 3,326,563.20
  5. Step 5: Solve for x
    x = 3,326,563.20/1,969.23
  6. Step 6: Final answer
    x = 1,689.27

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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.