Home / 1,286.32-1,929.59-361.96

Finding the Fourth Proportional to 1,286.32, 1,929.59 and 361.96

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Solution

The fourth proportional to 1,286.32, 1,929.59 and 361.96 is: 542.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.32 : 1,929.59 = 361.96 : x
  2. Step 2: Convert to fraction form
    1,286.32/1,929.59 = 361.96/x
  3. Step 3: Cross multiply
    1,286.32x = 1,929.59 × 361.96
  4. Step 4: Simplify right side
    1,286.32x = 698,434.40
  5. Step 5: Solve for x
    x = 698,434.40/1,286.32
  6. Step 6: Final answer
    x = 542.97

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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.