Home / 1,279.57-1,919.72-413.95

Finding the Fourth Proportional to 1,279.57, 1,919.72 and 413.95

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Solution

The fourth proportional to 1,279.57, 1,919.72 and 413.95 is: 621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.57 : 1,919.72 = 413.95 : x
  2. Step 2: Convert to fraction form
    1,279.57/1,919.72 = 413.95/x
  3. Step 3: Cross multiply
    1,279.57x = 1,919.72 × 413.95
  4. Step 4: Simplify right side
    1,279.57x = 794,666.02
  5. Step 5: Solve for x
    x = 794,666.02/1,279.57
  6. Step 6: Final answer
    x = 621.04

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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.