Home / 3,145.22-4,340.20-1,728.80

Finding the Fourth Proportional to 3,145.22, 4,340.20 and 1,728.80

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Solution

The fourth proportional to 3,145.22, 4,340.20 and 1,728.80 is: 2,385.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.22 : 4,340.20 = 1,728.80 : x
  2. Step 2: Convert to fraction form
    3,145.22/4,340.20 = 1,728.80/x
  3. Step 3: Cross multiply
    3,145.22x = 4,340.20 × 1,728.80
  4. Step 4: Simplify right side
    3,145.22x = 7,503,337.76
  5. Step 5: Solve for x
    x = 7,503,337.76/3,145.22
  6. Step 6: Final answer
    x = 2,385.63

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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.