Home / 2,880.96-3,970.20-1,995.12

Finding the Fourth Proportional to 2,880.96, 3,970.20 and 1,995.12

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Solution

The fourth proportional to 2,880.96, 3,970.20 and 1,995.12 is: 2,749.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.96 : 3,970.20 = 1,995.12 : x
  2. Step 2: Convert to fraction form
    2,880.96/3,970.20 = 1,995.12/x
  3. Step 3: Cross multiply
    2,880.96x = 3,970.20 × 1,995.12
  4. Step 4: Simplify right side
    2,880.96x = 7,921,025.42
  5. Step 5: Solve for x
    x = 7,921,025.42/2,880.96
  6. Step 6: Final answer
    x = 2,749.44

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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.