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Finding the Fourth Proportional to 1,233.05, 1,840.80 and 1,189.80

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Solution

The fourth proportional to 1,233.05, 1,840.80 and 1,189.80 is: 1,776.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.05 : 1,840.80 = 1,189.80 : x
  2. Step 2: Convert to fraction form
    1,233.05/1,840.80 = 1,189.80/x
  3. Step 3: Cross multiply
    1,233.05x = 1,840.80 × 1,189.80
  4. Step 4: Simplify right side
    1,233.05x = 2,190,183.84
  5. Step 5: Solve for x
    x = 2,190,183.84/1,233.05
  6. Step 6: Final answer
    x = 1,776.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.