Home / 1,385.56-1,912.71-1,195.75

Finding the Fourth Proportional to 1,385.56, 1,912.71 and 1,195.75

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Solution

The fourth proportional to 1,385.56, 1,912.71 and 1,195.75 is: 1,650.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.56 : 1,912.71 = 1,195.75 : x
  2. Step 2: Convert to fraction form
    1,385.56/1,912.71 = 1,195.75/x
  3. Step 3: Cross multiply
    1,385.56x = 1,912.71 × 1,195.75
  4. Step 4: Simplify right side
    1,385.56x = 2,287,122.98
  5. Step 5: Solve for x
    x = 2,287,122.98/1,385.56
  6. Step 6: Final answer
    x = 1,650.68

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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.