Home / 2,131.25-2,941.26-1,385.84

Finding the Fourth Proportional to 2,131.25, 2,941.26 and 1,385.84

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Solution

The fourth proportional to 2,131.25, 2,941.26 and 1,385.84 is: 1,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.25 : 2,941.26 = 1,385.84 : x
  2. Step 2: Convert to fraction form
    2,131.25/2,941.26 = 1,385.84/x
  3. Step 3: Cross multiply
    2,131.25x = 2,941.26 × 1,385.84
  4. Step 4: Simplify right side
    2,131.25x = 4,076,101.05
  5. Step 5: Solve for x
    x = 4,076,101.05/2,131.25
  6. Step 6: Final answer
    x = 1,912.54

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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.