Home / 1,911.80-2,638.33-1,353.27

Finding the Fourth Proportional to 1,911.80, 2,638.33 and 1,353.27

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Solution

The fourth proportional to 1,911.80, 2,638.33 and 1,353.27 is: 1,867.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.80 : 2,638.33 = 1,353.27 : x
  2. Step 2: Convert to fraction form
    1,911.80/2,638.33 = 1,353.27/x
  3. Step 3: Cross multiply
    1,911.80x = 2,638.33 × 1,353.27
  4. Step 4: Simplify right side
    1,911.80x = 3,570,379.35
  5. Step 5: Solve for x
    x = 3,570,379.35/1,911.80
  6. Step 6: Final answer
    x = 1,867.55

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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.