Home / 1,086.19-1,629.10-392.73

Finding the Fourth Proportional to 1,086.19, 1,629.10 and 392.73

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Solution

The fourth proportional to 1,086.19, 1,629.10 and 392.73 is: 589.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.19 : 1,629.10 = 392.73 : x
  2. Step 2: Convert to fraction form
    1,086.19/1,629.10 = 392.73/x
  3. Step 3: Cross multiply
    1,086.19x = 1,629.10 × 392.73
  4. Step 4: Simplify right side
    1,086.19x = 639,796.44
  5. Step 5: Solve for x
    x = 639,796.44/1,086.19
  6. Step 6: Final answer
    x = 589.03

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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.