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Finding the Fourth Proportional to 539,165.20, 809,413.40 and 339,485.20

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Solution

The fourth proportional to 539,165.20, 809,413.40 and 339,485.20 is: 509,646.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,165.20 : 809,413.40 = 339,485.20 : x
  2. Step 2: Convert to fraction form
    539,165.20/809,413.40 = 339,485.20/x
  3. Step 3: Cross multiply
    539,165.20x = 809,413.40 × 339,485.20
  4. Step 4: Simplify right side
    539,165.20x = 274,783,869,981.68
  5. Step 5: Solve for x
    x = 274,783,869,981.68/539,165.20
  6. Step 6: Final answer
    x = 509,646.89

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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.