Home / 2,768.35-3,821.88-1,918.84

Finding the Fourth Proportional to 2,768.35, 3,821.88 and 1,918.84

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Solution

The fourth proportional to 2,768.35, 3,821.88 and 1,918.84 is: 2,649.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,768.35 : 3,821.88 = 1,918.84 : x
  2. Step 2: Convert to fraction form
    2,768.35/3,821.88 = 1,918.84/x
  3. Step 3: Cross multiply
    2,768.35x = 3,821.88 × 1,918.84
  4. Step 4: Simplify right side
    2,768.35x = 7,333,581.03
  5. Step 5: Solve for x
    x = 7,333,581.03/2,768.35
  6. Step 6: Final answer
    x = 2,649.08

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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.