Home / 1,989.91-2,986.46-1,168.88

Finding the Fourth Proportional to 1,989.91, 2,986.46 and 1,168.88

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Solution

The fourth proportional to 1,989.91, 2,986.46 and 1,168.88 is: 1,754.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.91 : 2,986.46 = 1,168.88 : x
  2. Step 2: Convert to fraction form
    1,989.91/2,986.46 = 1,168.88/x
  3. Step 3: Cross multiply
    1,989.91x = 2,986.46 × 1,168.88
  4. Step 4: Simplify right side
    1,989.91x = 3,490,798.43
  5. Step 5: Solve for x
    x = 3,490,798.43/1,989.91
  6. Step 6: Final answer
    x = 1,754.25

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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.