Home / 3,122.86-4,309.60-1,778.62

Finding the Fourth Proportional to 3,122.86, 4,309.60 and 1,778.62

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Solution

The fourth proportional to 3,122.86, 4,309.60 and 1,778.62 is: 2,454.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.86 : 4,309.60 = 1,778.62 : x
  2. Step 2: Convert to fraction form
    3,122.86/4,309.60 = 1,778.62/x
  3. Step 3: Cross multiply
    3,122.86x = 4,309.60 × 1,778.62
  4. Step 4: Simplify right side
    3,122.86x = 7,665,140.75
  5. Step 5: Solve for x
    x = 7,665,140.75/3,122.86
  6. Step 6: Final answer
    x = 2,454.53

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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.