Home / 1,298.95-1,936.39-1,278.97

Finding the Fourth Proportional to 1,298.95, 1,936.39 and 1,278.97

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Solution

The fourth proportional to 1,298.95, 1,936.39 and 1,278.97 is: 1,906.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.95 : 1,936.39 = 1,278.97 : x
  2. Step 2: Convert to fraction form
    1,298.95/1,936.39 = 1,278.97/x
  3. Step 3: Cross multiply
    1,298.95x = 1,936.39 × 1,278.97
  4. Step 4: Simplify right side
    1,298.95x = 2,476,575.04
  5. Step 5: Solve for x
    x = 2,476,575.04/1,298.95
  6. Step 6: Final answer
    x = 1,906.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.