Home / 1,990.02-2,980.44-1,168.05

Finding the Fourth Proportional to 1,990.02, 2,980.44 and 1,168.05

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Solution

The fourth proportional to 1,990.02, 2,980.44 and 1,168.05 is: 1,749.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.02 : 2,980.44 = 1,168.05 : x
  2. Step 2: Convert to fraction form
    1,990.02/2,980.44 = 1,168.05/x
  3. Step 3: Cross multiply
    1,990.02x = 2,980.44 × 1,168.05
  4. Step 4: Simplify right side
    1,990.02x = 3,481,302.94
  5. Step 5: Solve for x
    x = 3,481,302.94/1,990.02
  6. Step 6: Final answer
    x = 1,749.38

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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.