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Finding the Fourth Proportional to 287,413.51, 396,611.67 and 172,623.95

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Solution

The fourth proportional to 287,413.51, 396,611.67 and 172,623.95 is: 238,209.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,413.51 : 396,611.67 = 172,623.95 : x
  2. Step 2: Convert to fraction form
    287,413.51/396,611.67 = 172,623.95/x
  3. Step 3: Cross multiply
    287,413.51x = 396,611.67 × 172,623.95
  4. Step 4: Simplify right side
    287,413.51x = 68,464,673,091.50
  5. Step 5: Solve for x
    x = 68,464,673,091.50/287,413.51
  6. Step 6: Final answer
    x = 238,209.66

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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.