Home / 1,286.09-1,929.21-361.58

Finding the Fourth Proportional to 1,286.09, 1,929.21 and 361.58

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Solution

The fourth proportional to 1,286.09, 1,929.21 and 361.58 is: 542.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.09 : 1,929.21 = 361.58 : x
  2. Step 2: Convert to fraction form
    1,286.09/1,929.21 = 361.58/x
  3. Step 3: Cross multiply
    1,286.09x = 1,929.21 × 361.58
  4. Step 4: Simplify right side
    1,286.09x = 697,568.57
  5. Step 5: Solve for x
    x = 697,568.57/1,286.09
  6. Step 6: Final answer
    x = 542.39

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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.