Home / 3,678.20-5,075.76-1,999.58

Finding the Fourth Proportional to 3,678.20, 5,075.76 and 1,999.58

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Solution

The fourth proportional to 3,678.20, 5,075.76 and 1,999.58 is: 2,759.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,678.20 : 5,075.76 = 1,999.58 : x
  2. Step 2: Convert to fraction form
    3,678.20/5,075.76 = 1,999.58/x
  3. Step 3: Cross multiply
    3,678.20x = 5,075.76 × 1,999.58
  4. Step 4: Simplify right side
    3,678.20x = 10,149,362.80
  5. Step 5: Solve for x
    x = 10,149,362.80/3,678.20
  6. Step 6: Final answer
    x = 2,759.33

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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.