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Finding the Fourth Proportional to 339,986.80, 509,980.20 and 251,413.30

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Solution

The fourth proportional to 339,986.80, 509,980.20 and 251,413.30 is: 377,119.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,986.80 : 509,980.20 = 251,413.30 : x
  2. Step 2: Convert to fraction form
    339,986.80/509,980.20 = 251,413.30/x
  3. Step 3: Cross multiply
    339,986.80x = 509,980.20 × 251,413.30
  4. Step 4: Simplify right side
    339,986.80x = 128,215,805,016.66
  5. Step 5: Solve for x
    x = 128,215,805,016.66/339,986.80
  6. Step 6: Final answer
    x = 377,119.95

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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.