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Finding the Fourth Proportional to 3,763.60, 5,645.40 and 3,180.40

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Solution

The fourth proportional to 3,763.60, 5,645.40 and 3,180.40 is: 4,770.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,763.60 : 5,645.40 = 3,180.40 : x
  2. Step 2: Convert to fraction form
    3,763.60/5,645.40 = 3,180.40/x
  3. Step 3: Cross multiply
    3,763.60x = 5,645.40 × 3,180.40
  4. Step 4: Simplify right side
    3,763.60x = 17,954,630.16
  5. Step 5: Solve for x
    x = 17,954,630.16/3,763.60
  6. Step 6: Final answer
    x = 4,770.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.