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Finding the Fourth Proportional to 371,382.15, 512,629.32 and 218,413.65

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Solution

The fourth proportional to 371,382.15, 512,629.32 and 218,413.65 is: 301,482.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,382.15 : 512,629.32 = 218,413.65 : x
  2. Step 2: Convert to fraction form
    371,382.15/512,629.32 = 218,413.65/x
  3. Step 3: Cross multiply
    371,382.15x = 512,629.32 × 218,413.65
  4. Step 4: Simplify right side
    371,382.15x = 111,965,240,878.22
  5. Step 5: Solve for x
    x = 111,965,240,878.22/371,382.15
  6. Step 6: Final answer
    x = 301,482.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.