Home / 1,086.19-1,629.29-316.69

Finding the Fourth Proportional to 1,086.19, 1,629.29 and 316.69

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Solution

The fourth proportional to 1,086.19, 1,629.29 and 316.69 is: 475.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.19 : 1,629.29 = 316.69 : x
  2. Step 2: Convert to fraction form
    1,086.19/1,629.29 = 316.69/x
  3. Step 3: Cross multiply
    1,086.19x = 1,629.29 × 316.69
  4. Step 4: Simplify right side
    1,086.19x = 515,974.19
  5. Step 5: Solve for x
    x = 515,974.19/1,086.19
  6. Step 6: Final answer
    x = 475.03

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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.