Home / 2,138.62-2,951.30-1,207.12

Finding the Fourth Proportional to 2,138.62, 2,951.30 and 1,207.12

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Solution

The fourth proportional to 2,138.62, 2,951.30 and 1,207.12 is: 1,665.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.62 : 2,951.30 = 1,207.12 : x
  2. Step 2: Convert to fraction form
    2,138.62/2,951.30 = 1,207.12/x
  3. Step 3: Cross multiply
    2,138.62x = 2,951.30 × 1,207.12
  4. Step 4: Simplify right side
    2,138.62x = 3,562,573.26
  5. Step 5: Solve for x
    x = 3,562,573.26/2,138.62
  6. Step 6: Final answer
    x = 1,665.83

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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.