Home / 1,629.60-2,249.36-1,209.81

Finding the Fourth Proportional to 1,629.60, 2,249.36 and 1,209.81

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Solution

The fourth proportional to 1,629.60, 2,249.36 and 1,209.81 is: 1,669.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.60 : 2,249.36 = 1,209.81 : x
  2. Step 2: Convert to fraction form
    1,629.60/2,249.36 = 1,209.81/x
  3. Step 3: Cross multiply
    1,629.60x = 2,249.36 × 1,209.81
  4. Step 4: Simplify right side
    1,629.60x = 2,721,298.22
  5. Step 5: Solve for x
    x = 2,721,298.22/1,629.60
  6. Step 6: Final answer
    x = 1,669.92

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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.