Home / 1,910.97-2,638.74-1,438.05

Finding the Fourth Proportional to 1,910.97, 2,638.74 and 1,438.05

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Solution

The fourth proportional to 1,910.97, 2,638.74 and 1,438.05 is: 1,985.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.97 : 2,638.74 = 1,438.05 : x
  2. Step 2: Convert to fraction form
    1,910.97/2,638.74 = 1,438.05/x
  3. Step 3: Cross multiply
    1,910.97x = 2,638.74 × 1,438.05
  4. Step 4: Simplify right side
    1,910.97x = 3,794,640.06
  5. Step 5: Solve for x
    x = 3,794,640.06/1,910.97
  6. Step 6: Final answer
    x = 1,985.71

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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.