Home / 2,761.20-4,146.60-1,945.20

Finding the Fourth Proportional to 2,761.20, 4,146.60 and 1,945.20

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Solution

The fourth proportional to 2,761.20, 4,146.60 and 1,945.20 is: 2,921.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.20 : 4,146.60 = 1,945.20 : x
  2. Step 2: Convert to fraction form
    2,761.20/4,146.60 = 1,945.20/x
  3. Step 3: Cross multiply
    2,761.20x = 4,146.60 × 1,945.20
  4. Step 4: Simplify right side
    2,761.20x = 8,065,966.32
  5. Step 5: Solve for x
    x = 8,065,966.32/2,761.20
  6. Step 6: Final answer
    x = 2,921.18

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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.