Home / 3,100.85-4,279.21-1,684.55

Finding the Fourth Proportional to 3,100.85, 4,279.21 and 1,684.55

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Solution

The fourth proportional to 3,100.85, 4,279.21 and 1,684.55 is: 2,324.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.85 : 4,279.21 = 1,684.55 : x
  2. Step 2: Convert to fraction form
    3,100.85/4,279.21 = 1,684.55/x
  3. Step 3: Cross multiply
    3,100.85x = 4,279.21 × 1,684.55
  4. Step 4: Simplify right side
    3,100.85x = 7,208,536.20
  5. Step 5: Solve for x
    x = 7,208,536.20/3,100.85
  6. Step 6: Final answer
    x = 2,324.70

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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.