Home / 2,239.89-3,091.09-1,231.61

Finding the Fourth Proportional to 2,239.89, 3,091.09 and 1,231.61

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Solution

The fourth proportional to 2,239.89, 3,091.09 and 1,231.61 is: 1,699.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.89 : 3,091.09 = 1,231.61 : x
  2. Step 2: Convert to fraction form
    2,239.89/3,091.09 = 1,231.61/x
  3. Step 3: Cross multiply
    2,239.89x = 3,091.09 × 1,231.61
  4. Step 4: Simplify right side
    2,239.89x = 3,807,017.35
  5. Step 5: Solve for x
    x = 3,807,017.35/2,239.89
  6. Step 6: Final answer
    x = 1,699.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.