Home / 2,120.90-2,927.34-1,236.86

Finding the Fourth Proportional to 2,120.90, 2,927.34 and 1,236.86

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Solution

The fourth proportional to 2,120.90, 2,927.34 and 1,236.86 is: 1,707.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.90 : 2,927.34 = 1,236.86 : x
  2. Step 2: Convert to fraction form
    2,120.90/2,927.34 = 1,236.86/x
  3. Step 3: Cross multiply
    2,120.90x = 2,927.34 × 1,236.86
  4. Step 4: Simplify right side
    2,120.90x = 3,620,709.75
  5. Step 5: Solve for x
    x = 3,620,709.75/2,120.90
  6. Step 6: Final answer
    x = 1,707.16

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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.