Home / 1,279.35-1,918.61-413.46

Finding the Fourth Proportional to 1,279.35, 1,918.61 and 413.46

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Solution

The fourth proportional to 1,279.35, 1,918.61 and 413.46 is: 620.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.35 : 1,918.61 = 413.46 : x
  2. Step 2: Convert to fraction form
    1,279.35/1,918.61 = 413.46/x
  3. Step 3: Cross multiply
    1,279.35x = 1,918.61 × 413.46
  4. Step 4: Simplify right side
    1,279.35x = 793,268.49
  5. Step 5: Solve for x
    x = 793,268.49/1,279.35
  6. Step 6: Final answer
    x = 620.06

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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.