Home / 1,185.35-1,634.91-811.94

Finding the Fourth Proportional to 1,185.35, 1,634.91 and 811.94

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Solution

The fourth proportional to 1,185.35, 1,634.91 and 811.94 is: 1,119.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.35 : 1,634.91 = 811.94 : x
  2. Step 2: Convert to fraction form
    1,185.35/1,634.91 = 811.94/x
  3. Step 3: Cross multiply
    1,185.35x = 1,634.91 × 811.94
  4. Step 4: Simplify right side
    1,185.35x = 1,327,440.65
  5. Step 5: Solve for x
    x = 1,327,440.65/1,185.35
  6. Step 6: Final answer
    x = 1,119.88

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1.5x scale

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.