Home / 1,912.35-2,638.40-1,214.13

Finding the Fourth Proportional to 1,912.35, 2,638.40 and 1,214.13

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Solution

The fourth proportional to 1,912.35, 2,638.40 and 1,214.13 is: 1,675.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.35 : 2,638.40 = 1,214.13 : x
  2. Step 2: Convert to fraction form
    1,912.35/2,638.40 = 1,214.13/x
  3. Step 3: Cross multiply
    1,912.35x = 2,638.40 × 1,214.13
  4. Step 4: Simplify right side
    1,912.35x = 3,203,354.52
  5. Step 5: Solve for x
    x = 3,203,354.52/1,912.35
  6. Step 6: Final answer
    x = 1,675.09

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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.