Home / 1,394.18-1,936.88-1,381.50

Finding the Fourth Proportional to 1,394.18, 1,936.88 and 1,381.50

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Solution

The fourth proportional to 1,394.18, 1,936.88 and 1,381.50 is: 1,919.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.18 : 1,936.88 = 1,381.50 : x
  2. Step 2: Convert to fraction form
    1,394.18/1,936.88 = 1,381.50/x
  3. Step 3: Cross multiply
    1,394.18x = 1,936.88 × 1,381.50
  4. Step 4: Simplify right side
    1,394.18x = 2,675,799.72
  5. Step 5: Solve for x
    x = 2,675,799.72/1,394.18
  6. Step 6: Final answer
    x = 1,919.26

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.