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Finding the Fourth Proportional to 1,232.79, 1,840.41 and 1,189.54

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Solution

The fourth proportional to 1,232.79, 1,840.41 and 1,189.54 is: 1,775.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.79 : 1,840.41 = 1,189.54 : x
  2. Step 2: Convert to fraction form
    1,232.79/1,840.41 = 1,189.54/x
  3. Step 3: Cross multiply
    1,232.79x = 1,840.41 × 1,189.54
  4. Step 4: Simplify right side
    1,232.79x = 2,189,235.36
  5. Step 5: Solve for x
    x = 2,189,235.36/1,232.79
  6. Step 6: Final answer
    x = 1,775.84

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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.