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Finding the Fourth Proportional to 408,007.20, 611,413.20 and 365,887.20

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Solution

The fourth proportional to 408,007.20, 611,413.20 and 365,887.20 is: 548,294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,007.20 : 611,413.20 = 365,887.20 : x
  2. Step 2: Convert to fraction form
    408,007.20/611,413.20 = 365,887.20/x
  3. Step 3: Cross multiply
    408,007.20x = 611,413.20 × 365,887.20
  4. Step 4: Simplify right side
    408,007.20x = 223,708,263,791.04
  5. Step 5: Solve for x
    x = 223,708,263,791.04/408,007.20
  6. Step 6: Final answer
    x = 548,294.89

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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.