Home / 1,279.11-1,918.67-401.62

Finding the Fourth Proportional to 1,279.11, 1,918.67 and 401.62

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Solution

The fourth proportional to 1,279.11, 1,918.67 and 401.62 is: 602.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.11 : 1,918.67 = 401.62 : x
  2. Step 2: Convert to fraction form
    1,279.11/1,918.67 = 401.62/x
  3. Step 3: Cross multiply
    1,279.11x = 1,918.67 × 401.62
  4. Step 4: Simplify right side
    1,279.11x = 770,569.44
  5. Step 5: Solve for x
    x = 770,569.44/1,279.11
  6. Step 6: Final answer
    x = 602.42

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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.