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Finding the Fourth Proportional to 2,989.84, 4,485.12 and 798.64

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Solution

The fourth proportional to 2,989.84, 4,485.12 and 798.64 is: 1,198.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.84 : 4,485.12 = 798.64 : x
  2. Step 2: Convert to fraction form
    2,989.84/4,485.12 = 798.64/x
  3. Step 3: Cross multiply
    2,989.84x = 4,485.12 × 798.64
  4. Step 4: Simplify right side
    2,989.84x = 3,581,996.24
  5. Step 5: Solve for x
    x = 3,581,996.24/2,989.84
  6. Step 6: Final answer
    x = 1,198.06

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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.