Home / 3,122.21-4,309.04-1,778.15

Finding the Fourth Proportional to 3,122.21, 4,309.04 and 1,778.15

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Solution

The fourth proportional to 3,122.21, 4,309.04 and 1,778.15 is: 2,454.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.21 : 4,309.04 = 1,778.15 : x
  2. Step 2: Convert to fraction form
    3,122.21/4,309.04 = 1,778.15/x
  3. Step 3: Cross multiply
    3,122.21x = 4,309.04 × 1,778.15
  4. Step 4: Simplify right side
    3,122.21x = 7,662,122.19
  5. Step 5: Solve for x
    x = 7,662,122.19/3,122.21
  6. Step 6: Final answer
    x = 2,454.07

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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.