Home / 1,991.23-2,750.21-1,326.92

Finding the Fourth Proportional to 1,991.23, 2,750.21 and 1,326.92

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Solution

The fourth proportional to 1,991.23, 2,750.21 and 1,326.92 is: 1,832.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.23 : 2,750.21 = 1,326.92 : x
  2. Step 2: Convert to fraction form
    1,991.23/2,750.21 = 1,326.92/x
  3. Step 3: Cross multiply
    1,991.23x = 2,750.21 × 1,326.92
  4. Step 4: Simplify right side
    1,991.23x = 3,649,302.02
  5. Step 5: Solve for x
    x = 3,649,302.02/1,991.23
  6. Step 6: Final answer
    x = 1,832.69

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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.