Home / 2,313.36-3,191.81-1,318.28

Finding the Fourth Proportional to 2,313.36, 3,191.81 and 1,318.28

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Solution

The fourth proportional to 2,313.36, 3,191.81 and 1,318.28 is: 1,818.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,313.36 : 3,191.81 = 1,318.28 : x
  2. Step 2: Convert to fraction form
    2,313.36/3,191.81 = 1,318.28/x
  3. Step 3: Cross multiply
    2,313.36x = 3,191.81 × 1,318.28
  4. Step 4: Simplify right side
    2,313.36x = 4,207,676.74
  5. Step 5: Solve for x
    x = 4,207,676.74/2,313.36
  6. Step 6: Final answer
    x = 1,818.86

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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.