Home / 2,313.81-3,192.30-1,318.90

Finding the Fourth Proportional to 2,313.81, 3,192.30 and 1,318.90

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Solution

The fourth proportional to 2,313.81, 3,192.30 and 1,318.90 is: 1,819.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.81 : 3,192.30 = 1,318.90 : x
  2. Step 2: Convert to fraction form
    2,313.81/3,192.30 = 1,318.90/x
  3. Step 3: Cross multiply
    2,313.81x = 3,192.30 × 1,318.90
  4. Step 4: Simplify right side
    2,313.81x = 4,210,324.47
  5. Step 5: Solve for x
    x = 4,210,324.47/2,313.81
  6. Step 6: Final answer
    x = 1,819.65

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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.