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Finding the Fourth Proportional to 307,621.20, 461,431.80 and 245,413.20

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Solution

The fourth proportional to 307,621.20, 461,431.80 and 245,413.20 is: 368,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,621.20 : 461,431.80 = 245,413.20 : x
  2. Step 2: Convert to fraction form
    307,621.20/461,431.80 = 245,413.20/x
  3. Step 3: Cross multiply
    307,621.20x = 461,431.80 × 245,413.20
  4. Step 4: Simplify right side
    307,621.20x = 113,241,454,619.76
  5. Step 5: Solve for x
    x = 113,241,454,619.76/307,621.20
  6. Step 6: Final answer
    x = 368,119.80

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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.