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Finding the Fourth Proportional to 339,949.90, 509,908.65 and 115,288.30

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Solution

The fourth proportional to 339,949.90, 509,908.65 and 115,288.30 is: 172,926.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,949.90 : 509,908.65 = 115,288.30 : x
  2. Step 2: Convert to fraction form
    339,949.90/509,908.65 = 115,288.30/x
  3. Step 3: Cross multiply
    339,949.90x = 509,908.65 × 115,288.30
  4. Step 4: Simplify right side
    339,949.90x = 58,786,501,413.80
  5. Step 5: Solve for x
    x = 58,786,501,413.80/339,949.90
  6. Step 6: Final answer
    x = 172,926.96

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1.5x scale

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.