Home / 1,938.25-2,674.79-1,276.21

Finding the Fourth Proportional to 1,938.25, 2,674.79 and 1,276.21

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Solution

The fourth proportional to 1,938.25, 2,674.79 and 1,276.21 is: 1,761.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.25 : 2,674.79 = 1,276.21 : x
  2. Step 2: Convert to fraction form
    1,938.25/2,674.79 = 1,276.21/x
  3. Step 3: Cross multiply
    1,938.25x = 2,674.79 × 1,276.21
  4. Step 4: Simplify right side
    1,938.25x = 3,413,593.75
  5. Step 5: Solve for x
    x = 3,413,593.75/1,938.25
  6. Step 6: Final answer
    x = 1,761.17

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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.