Home / 840,309.60-1,259,413.20-419,702.88

Finding the Fourth Proportional to 840,309.60, 1,259,413.20 and 419,702.88

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Solution

The fourth proportional to 840,309.60, 1,259,413.20 and 419,702.88 is: 629,029.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,309.60 : 1,259,413.20 = 419,702.88 : x
  2. Step 2: Convert to fraction form
    840,309.60/1,259,413.20 = 419,702.88/x
  3. Step 3: Cross multiply
    840,309.60x = 1,259,413.20 × 419,702.88
  4. Step 4: Simplify right side
    840,309.60x = 528,579,347,150.02
  5. Step 5: Solve for x
    x = 528,579,347,150.02/840,309.60
  6. Step 6: Final answer
    x = 629,029.29

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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.