Home / 2,128.66-3,192.92-1,089.08

Finding the Fourth Proportional to 2,128.66, 3,192.92 and 1,089.08

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Solution

The fourth proportional to 2,128.66, 3,192.92 and 1,089.08 is: 1,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.66 : 3,192.92 = 1,089.08 : x
  2. Step 2: Convert to fraction form
    2,128.66/3,192.92 = 1,089.08/x
  3. Step 3: Cross multiply
    2,128.66x = 3,192.92 × 1,089.08
  4. Step 4: Simplify right side
    2,128.66x = 3,477,345.31
  5. Step 5: Solve for x
    x = 3,477,345.31/2,128.66
  6. Step 6: Final answer
    x = 1,633.58

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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.