Home / 1,286.05-1,929.08-361.61

Finding the Fourth Proportional to 1,286.05, 1,929.08 and 361.61

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Solution

The fourth proportional to 1,286.05, 1,929.08 and 361.61 is: 542.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.05 : 1,929.08 = 361.61 : x
  2. Step 2: Convert to fraction form
    1,286.05/1,929.08 = 361.61/x
  3. Step 3: Cross multiply
    1,286.05x = 1,929.08 × 361.61
  4. Step 4: Simplify right side
    1,286.05x = 697,581.93
  5. Step 5: Solve for x
    x = 697,581.93/1,286.05
  6. Step 6: Final answer
    x = 542.42

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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.