Home / 2,782.02-4,172.60-1,221.68

Finding the Fourth Proportional to 2,782.02, 4,172.60 and 1,221.68

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Solution

The fourth proportional to 2,782.02, 4,172.60 and 1,221.68 is: 1,832.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.02 : 4,172.60 = 1,221.68 : x
  2. Step 2: Convert to fraction form
    2,782.02/4,172.60 = 1,221.68/x
  3. Step 3: Cross multiply
    2,782.02x = 4,172.60 × 1,221.68
  4. Step 4: Simplify right side
    2,782.02x = 5,097,581.97
  5. Step 5: Solve for x
    x = 5,097,581.97/2,782.02
  6. Step 6: Final answer
    x = 1,832.33

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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.