Home / 1,394.52-2,079.61-1,221.99

Finding the Fourth Proportional to 1,394.52, 2,079.61 and 1,221.99

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Solution

The fourth proportional to 1,394.52, 2,079.61 and 1,221.99 is: 1,822.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.52 : 2,079.61 = 1,221.99 : x
  2. Step 2: Convert to fraction form
    1,394.52/2,079.61 = 1,221.99/x
  3. Step 3: Cross multiply
    1,394.52x = 2,079.61 × 1,221.99
  4. Step 4: Simplify right side
    1,394.52x = 2,541,259.57
  5. Step 5: Solve for x
    x = 2,541,259.57/1,394.52
  6. Step 6: Final answer
    x = 1,822.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.