Home / 1,938.43-2,675.33-1,309.87

Finding the Fourth Proportional to 1,938.43, 2,675.33 and 1,309.87

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Solution

The fourth proportional to 1,938.43, 2,675.33 and 1,309.87 is: 1,807.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.43 : 2,675.33 = 1,309.87 : x
  2. Step 2: Convert to fraction form
    1,938.43/2,675.33 = 1,309.87/x
  3. Step 3: Cross multiply
    1,938.43x = 2,675.33 × 1,309.87
  4. Step 4: Simplify right side
    1,938.43x = 3,504,334.51
  5. Step 5: Solve for x
    x = 3,504,334.51/1,938.43
  6. Step 6: Final answer
    x = 1,807.82

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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.