Home / 1,313.91-1,968.82-1,118.12

Finding the Fourth Proportional to 1,313.91, 1,968.82 and 1,118.12

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Solution

The fourth proportional to 1,313.91, 1,968.82 and 1,118.12 is: 1,675.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,313.91 : 1,968.82 = 1,118.12 : x
  2. Step 2: Convert to fraction form
    1,313.91/1,968.82 = 1,118.12/x
  3. Step 3: Cross multiply
    1,313.91x = 1,968.82 × 1,118.12
  4. Step 4: Simplify right side
    1,313.91x = 2,201,364.38
  5. Step 5: Solve for x
    x = 2,201,364.38/1,313.91
  6. Step 6: Final answer
    x = 1,675.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.