Home / 1,778.43-2,664.09-1,221.78

Finding the Fourth Proportional to 1,778.43, 2,664.09 and 1,221.78

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Solution

The fourth proportional to 1,778.43, 2,664.09 and 1,221.78 is: 1,830.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.43 : 2,664.09 = 1,221.78 : x
  2. Step 2: Convert to fraction form
    1,778.43/2,664.09 = 1,221.78/x
  3. Step 3: Cross multiply
    1,778.43x = 2,664.09 × 1,221.78
  4. Step 4: Simplify right side
    1,778.43x = 3,254,931.88
  5. Step 5: Solve for x
    x = 3,254,931.88/1,778.43
  6. Step 6: Final answer
    x = 1,830.23

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1.5x scale

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.