Home / 1,231.25-1,848.49-1,129.37

Finding the Fourth Proportional to 1,231.25, 1,848.49 and 1,129.37

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Solution

The fourth proportional to 1,231.25, 1,848.49 and 1,129.37 is: 1,695.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.25 : 1,848.49 = 1,129.37 : x
  2. Step 2: Convert to fraction form
    1,231.25/1,848.49 = 1,129.37/x
  3. Step 3: Cross multiply
    1,231.25x = 1,848.49 × 1,129.37
  4. Step 4: Simplify right side
    1,231.25x = 2,087,617.09
  5. Step 5: Solve for x
    x = 2,087,617.09/1,231.25
  6. Step 6: Final answer
    x = 1,695.53

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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.