Home / 2,847.85-3,930.03-1,728.49

Finding the Fourth Proportional to 2,847.85, 3,930.03 and 1,728.49

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Solution

The fourth proportional to 2,847.85, 3,930.03 and 1,728.49 is: 2,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.85 : 3,930.03 = 1,728.49 : x
  2. Step 2: Convert to fraction form
    2,847.85/3,930.03 = 1,728.49/x
  3. Step 3: Cross multiply
    2,847.85x = 3,930.03 × 1,728.49
  4. Step 4: Simplify right side
    2,847.85x = 6,793,017.55
  5. Step 5: Solve for x
    x = 6,793,017.55/2,847.85
  6. Step 6: Final answer
    x = 2,385.31

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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.