Home / 1,313.23-1,812.26-723.76

Finding the Fourth Proportional to 1,313.23, 1,812.26 and 723.76

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Solution

The fourth proportional to 1,313.23, 1,812.26 and 723.76 is: 998.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.23 : 1,812.26 = 723.76 : x
  2. Step 2: Convert to fraction form
    1,313.23/1,812.26 = 723.76/x
  3. Step 3: Cross multiply
    1,313.23x = 1,812.26 × 723.76
  4. Step 4: Simplify right side
    1,313.23x = 1,311,637.68
  5. Step 5: Solve for x
    x = 1,311,637.68/1,313.23
  6. Step 6: Final answer
    x = 998.79

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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.