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Finding the Fourth Proportional to 2,080.44, 3,121.02 and 985.50

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Solution

The fourth proportional to 2,080.44, 3,121.02 and 985.50 is: 1,478.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,080.44 : 3,121.02 = 985.50 : x
  2. Step 2: Convert to fraction form
    2,080.44/3,121.02 = 985.50/x
  3. Step 3: Cross multiply
    2,080.44x = 3,121.02 × 985.50
  4. Step 4: Simplify right side
    2,080.44x = 3,075,765.21
  5. Step 5: Solve for x
    x = 3,075,765.21/2,080.44
  6. Step 6: Final answer
    x = 1,478.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.