Home / 1,961.40-2,938.86-1,383.08

Finding the Fourth Proportional to 1,961.40, 2,938.86 and 1,383.08

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Solution

The fourth proportional to 1,961.40, 2,938.86 and 1,383.08 is: 2,072.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.40 : 2,938.86 = 1,383.08 : x
  2. Step 2: Convert to fraction form
    1,961.40/2,938.86 = 1,383.08/x
  3. Step 3: Cross multiply
    1,961.40x = 2,938.86 × 1,383.08
  4. Step 4: Simplify right side
    1,961.40x = 4,064,678.49
  5. Step 5: Solve for x
    x = 4,064,678.49/1,961.40
  6. Step 6: Final answer
    x = 2,072.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.