Home / 1,909.08-2,636.73-1,278.54

Finding the Fourth Proportional to 1,909.08, 2,636.73 and 1,278.54

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Solution

The fourth proportional to 1,909.08, 2,636.73 and 1,278.54 is: 1,765.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.08 : 2,636.73 = 1,278.54 : x
  2. Step 2: Convert to fraction form
    1,909.08/2,636.73 = 1,278.54/x
  3. Step 3: Cross multiply
    1,909.08x = 2,636.73 × 1,278.54
  4. Step 4: Simplify right side
    1,909.08x = 3,371,164.77
  5. Step 5: Solve for x
    x = 3,371,164.77/1,909.08
  6. Step 6: Final answer
    x = 1,765.86

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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.