Home / 2,138.97-2,951.73-1,254.81

Finding the Fourth Proportional to 2,138.97, 2,951.73 and 1,254.81

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Solution

The fourth proportional to 2,138.97, 2,951.73 and 1,254.81 is: 1,731.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.97 : 2,951.73 = 1,254.81 : x
  2. Step 2: Convert to fraction form
    2,138.97/2,951.73 = 1,254.81/x
  3. Step 3: Cross multiply
    2,138.97x = 2,951.73 × 1,254.81
  4. Step 4: Simplify right side
    2,138.97x = 3,703,860.32
  5. Step 5: Solve for x
    x = 3,703,860.32/2,138.97
  6. Step 6: Final answer
    x = 1,731.61

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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.