Home / 1,911.97-2,867.35-1,299.61

Finding the Fourth Proportional to 1,911.97, 2,867.35 and 1,299.61

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Solution

The fourth proportional to 1,911.97, 2,867.35 and 1,299.61 is: 1,949.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.97 : 2,867.35 = 1,299.61 : x
  2. Step 2: Convert to fraction form
    1,911.97/2,867.35 = 1,299.61/x
  3. Step 3: Cross multiply
    1,911.97x = 2,867.35 × 1,299.61
  4. Step 4: Simplify right side
    1,911.97x = 3,726,444.63
  5. Step 5: Solve for x
    x = 3,726,444.63/1,911.97
  6. Step 6: Final answer
    x = 1,949.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.