Home / 1,989.21-2,984.09-1,156.66

Finding the Fourth Proportional to 1,989.21, 2,984.09 and 1,156.66

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Solution

The fourth proportional to 1,989.21, 2,984.09 and 1,156.66 is: 1,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.21 : 2,984.09 = 1,156.66 : x
  2. Step 2: Convert to fraction form
    1,989.21/2,984.09 = 1,156.66/x
  3. Step 3: Cross multiply
    1,989.21x = 2,984.09 × 1,156.66
  4. Step 4: Simplify right side
    1,989.21x = 3,451,577.54
  5. Step 5: Solve for x
    x = 3,451,577.54/1,989.21
  6. Step 6: Final answer
    x = 1,735.15

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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.