Home / 1,938.83-2,674.19-1,191.80

Finding the Fourth Proportional to 1,938.83, 2,674.19 and 1,191.80

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Solution

The fourth proportional to 1,938.83, 2,674.19 and 1,191.80 is: 1,643.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.83 : 2,674.19 = 1,191.80 : x
  2. Step 2: Convert to fraction form
    1,938.83/2,674.19 = 1,191.80/x
  3. Step 3: Cross multiply
    1,938.83x = 2,674.19 × 1,191.80
  4. Step 4: Simplify right side
    1,938.83x = 3,187,080.31
  5. Step 5: Solve for x
    x = 3,187,080.31/1,938.83
  6. Step 6: Final answer
    x = 1,643.82

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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.