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Finding the Fourth Proportional to 2,138.99, 2,951.54 and 1,194.84

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Solution

The fourth proportional to 2,138.99, 2,951.54 and 1,194.84 is: 1,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.99 : 2,951.54 = 1,194.84 : x
  2. Step 2: Convert to fraction form
    2,138.99/2,951.54 = 1,194.84/x
  3. Step 3: Cross multiply
    2,138.99x = 2,951.54 × 1,194.84
  4. Step 4: Simplify right side
    2,138.99x = 3,526,612.08
  5. Step 5: Solve for x
    x = 3,526,612.08/2,138.99
  6. Step 6: Final answer
    x = 1,648.73

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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.