Home / 1,912.32-2,636.48-1,380.76

Finding the Fourth Proportional to 1,912.32, 2,636.48 and 1,380.76

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Solution

The fourth proportional to 1,912.32, 2,636.48 and 1,380.76 is: 1,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.32 : 2,636.48 = 1,380.76 : x
  2. Step 2: Convert to fraction form
    1,912.32/2,636.48 = 1,380.76/x
  3. Step 3: Cross multiply
    1,912.32x = 2,636.48 × 1,380.76
  4. Step 4: Simplify right side
    1,912.32x = 3,640,342.99
  5. Step 5: Solve for x
    x = 3,640,342.99/1,912.32
  6. Step 6: Final answer
    x = 1,903.63

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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.