Home / 2,144.48-2,959.20-1,212.80

Finding the Fourth Proportional to 2,144.48, 2,959.20 and 1,212.80

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Solution

The fourth proportional to 2,144.48, 2,959.20 and 1,212.80 is: 1,673.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.48 : 2,959.20 = 1,212.80 : x
  2. Step 2: Convert to fraction form
    2,144.48/2,959.20 = 1,212.80/x
  3. Step 3: Cross multiply
    2,144.48x = 2,959.20 × 1,212.80
  4. Step 4: Simplify right side
    2,144.48x = 3,588,917.76
  5. Step 5: Solve for x
    x = 3,588,917.76/2,144.48
  6. Step 6: Final answer
    x = 1,673.56

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1.5x scale

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.