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Finding the Fourth Proportional to 2,138.95, 2,951.72 and 1,194.76

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Solution

The fourth proportional to 2,138.95, 2,951.72 and 1,194.76 is: 1,648.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.95 : 2,951.72 = 1,194.76 : x
  2. Step 2: Convert to fraction form
    2,138.95/2,951.72 = 1,194.76/x
  3. Step 3: Cross multiply
    2,138.95x = 2,951.72 × 1,194.76
  4. Step 4: Simplify right side
    2,138.95x = 3,526,579.24
  5. Step 5: Solve for x
    x = 3,526,579.24/2,138.95
  6. Step 6: Final answer
    x = 1,648.75

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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.