Home / 2,313.56-3,191.40-1,427.78

Finding the Fourth Proportional to 2,313.56, 3,191.40 and 1,427.78

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Solution

The fourth proportional to 2,313.56, 3,191.40 and 1,427.78 is: 1,969.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.56 : 3,191.40 = 1,427.78 : x
  2. Step 2: Convert to fraction form
    2,313.56/3,191.40 = 1,427.78/x
  3. Step 3: Cross multiply
    2,313.56x = 3,191.40 × 1,427.78
  4. Step 4: Simplify right side
    2,313.56x = 4,556,617.09
  5. Step 5: Solve for x
    x = 4,556,617.09/2,313.56
  6. Step 6: Final answer
    x = 1,969.53

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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.