Home / 3,187.80-4,778.96-1,212.33

Finding the Fourth Proportional to 3,187.80, 4,778.96 and 1,212.33

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Solution

The fourth proportional to 3,187.80, 4,778.96 and 1,212.33 is: 1,817.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.80 : 4,778.96 = 1,212.33 : x
  2. Step 2: Convert to fraction form
    3,187.80/4,778.96 = 1,212.33/x
  3. Step 3: Cross multiply
    3,187.80x = 4,778.96 × 1,212.33
  4. Step 4: Simplify right side
    3,187.80x = 5,793,670.52
  5. Step 5: Solve for x
    x = 5,793,670.52/3,187.80
  6. Step 6: Final answer
    x = 1,817.45

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1.5x scale

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.