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Finding the Fourth Proportional to 1,232.81, 1,849.55 and 685.37

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Solution

The fourth proportional to 1,232.81, 1,849.55 and 685.37 is: 1,028.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.81 : 1,849.55 = 685.37 : x
  2. Step 2: Convert to fraction form
    1,232.81/1,849.55 = 685.37/x
  3. Step 3: Cross multiply
    1,232.81x = 1,849.55 × 685.37
  4. Step 4: Simplify right side
    1,232.81x = 1,267,635.18
  5. Step 5: Solve for x
    x = 1,267,635.18/1,232.81
  6. Step 6: Final answer
    x = 1,028.25

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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.