Home / 3,615.60-5,416.20-1,969.20

Finding the Fourth Proportional to 3,615.60, 5,416.20 and 1,969.20

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Solution

The fourth proportional to 3,615.60, 5,416.20 and 1,969.20 is: 2,949.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.60 : 5,416.20 = 1,969.20 : x
  2. Step 2: Convert to fraction form
    3,615.60/5,416.20 = 1,969.20/x
  3. Step 3: Cross multiply
    3,615.60x = 5,416.20 × 1,969.20
  4. Step 4: Simplify right side
    3,615.60x = 10,665,581.04
  5. Step 5: Solve for x
    x = 10,665,581.04/3,615.60
  6. Step 6: Final answer
    x = 2,949.88

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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.