Home / 993,999.20-1,490,998.80-639,413.60

Finding the Fourth Proportional to 993,999.20, 1,490,998.80 and 639,413.60

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Solution

The fourth proportional to 993,999.20, 1,490,998.80 and 639,413.60 is: 959,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,999.20 : 1,490,998.80 = 639,413.60 : x
  2. Step 2: Convert to fraction form
    993,999.20/1,490,998.80 = 639,413.60/x
  3. Step 3: Cross multiply
    993,999.20x = 1,490,998.80 × 639,413.60
  4. Step 4: Simplify right side
    993,999.20x = 953,364,910,303.68
  5. Step 5: Solve for x
    x = 953,364,910,303.68/993,999.20
  6. Step 6: Final answer
    x = 959,120.40

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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.