Home / 1,286.11-1,929.27-361.67

Finding the Fourth Proportional to 1,286.11, 1,929.27 and 361.67

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Solution

The fourth proportional to 1,286.11, 1,929.27 and 361.67 is: 542.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.11 : 1,929.27 = 361.67 : x
  2. Step 2: Convert to fraction form
    1,286.11/1,929.27 = 361.67/x
  3. Step 3: Cross multiply
    1,286.11x = 1,929.27 × 361.67
  4. Step 4: Simplify right side
    1,286.11x = 697,763.90
  5. Step 5: Solve for x
    x = 697,763.90/1,286.11
  6. Step 6: Final answer
    x = 542.54

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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.