Home / 1,427.78-1,971.26-1,278.14

Finding the Fourth Proportional to 1,427.78, 1,971.26 and 1,278.14

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Solution

The fourth proportional to 1,427.78, 1,971.26 and 1,278.14 is: 1,764.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.78 : 1,971.26 = 1,278.14 : x
  2. Step 2: Convert to fraction form
    1,427.78/1,971.26 = 1,278.14/x
  3. Step 3: Cross multiply
    1,427.78x = 1,971.26 × 1,278.14
  4. Step 4: Simplify right side
    1,427.78x = 2,519,546.26
  5. Step 5: Solve for x
    x = 2,519,546.26/1,427.78
  6. Step 6: Final answer
    x = 1,764.66

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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.