Home / 1,313.16-1,812.34-1,091.74

Finding the Fourth Proportional to 1,313.16, 1,812.34 and 1,091.74

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Solution

The fourth proportional to 1,313.16, 1,812.34 and 1,091.74 is: 1,506.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.16 : 1,812.34 = 1,091.74 : x
  2. Step 2: Convert to fraction form
    1,313.16/1,812.34 = 1,091.74/x
  3. Step 3: Cross multiply
    1,313.16x = 1,812.34 × 1,091.74
  4. Step 4: Simplify right side
    1,313.16x = 1,978,604.07
  5. Step 5: Solve for x
    x = 1,978,604.07/1,313.16
  6. Step 6: Final answer
    x = 1,506.75

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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.