Home / 1,086.35-1,629.19-392.93

Finding the Fourth Proportional to 1,086.35, 1,629.19 and 392.93

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Solution

The fourth proportional to 1,086.35, 1,629.19 and 392.93 is: 589.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.35 : 1,629.19 = 392.93 : x
  2. Step 2: Convert to fraction form
    1,086.35/1,629.19 = 392.93/x
  3. Step 3: Cross multiply
    1,086.35x = 1,629.19 × 392.93
  4. Step 4: Simplify right side
    1,086.35x = 640,160.72
  5. Step 5: Solve for x
    x = 640,160.72/1,086.35
  6. Step 6: Final answer
    x = 589.28

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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.