Home / 3,290.90-4,939.47-1,212.89

Finding the Fourth Proportional to 3,290.90, 4,939.47 and 1,212.89

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Solution

The fourth proportional to 3,290.90, 4,939.47 and 1,212.89 is: 1,820.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,290.90 : 4,939.47 = 1,212.89 : x
  2. Step 2: Convert to fraction form
    3,290.90/4,939.47 = 1,212.89/x
  3. Step 3: Cross multiply
    3,290.90x = 4,939.47 × 1,212.89
  4. Step 4: Simplify right side
    3,290.90x = 5,991,009.07
  5. Step 5: Solve for x
    x = 5,991,009.07/3,290.90
  6. Step 6: Final answer
    x = 1,820.48

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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.