Home / 1,338.10-2,006.98-413.65

Finding the Fourth Proportional to 1,338.10, 2,006.98 and 413.65

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Solution

The fourth proportional to 1,338.10, 2,006.98 and 413.65 is: 620.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.10 : 2,006.98 = 413.65 : x
  2. Step 2: Convert to fraction form
    1,338.10/2,006.98 = 413.65/x
  3. Step 3: Cross multiply
    1,338.10x = 2,006.98 × 413.65
  4. Step 4: Simplify right side
    1,338.10x = 830,187.28
  5. Step 5: Solve for x
    x = 830,187.28/1,338.10
  6. Step 6: Final answer
    x = 620.42

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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.