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Finding the Fourth Proportional to 890,216.80, 1,335,195.60 and 259,064.80

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Solution

The fourth proportional to 890,216.80, 1,335,195.60 and 259,064.80 is: 388,559.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,216.80 : 1,335,195.60 = 259,064.80 : x
  2. Step 2: Convert to fraction form
    890,216.80/1,335,195.60 = 259,064.80/x
  3. Step 3: Cross multiply
    890,216.80x = 1,335,195.60 × 259,064.80
  4. Step 4: Simplify right side
    890,216.80x = 345,902,181,074.88
  5. Step 5: Solve for x
    x = 345,902,181,074.88/890,216.80
  6. Step 6: Final answer
    x = 388,559.48

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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.