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Finding the Fourth Proportional to 611,589.60, 916,801.20 and 476,578.80

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Solution

The fourth proportional to 611,589.60, 916,801.20 and 476,578.80 is: 714,413.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,589.60 : 916,801.20 = 476,578.80 : x
  2. Step 2: Convert to fraction form
    611,589.60/916,801.20 = 476,578.80/x
  3. Step 3: Cross multiply
    611,589.60x = 916,801.20 × 476,578.80
  4. Step 4: Simplify right side
    611,589.60x = 436,928,015,734.56
  5. Step 5: Solve for x
    x = 436,928,015,734.56/611,589.60
  6. Step 6: Final answer
    x = 714,413.74

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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.