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Finding the Fourth Proportional to 889,772.80, 1,334,529.60 and 258,620.80

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Solution

The fourth proportional to 889,772.80, 1,334,529.60 and 258,620.80 is: 387,893.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,772.80 : 1,334,529.60 = 258,620.80 : x
  2. Step 2: Convert to fraction form
    889,772.80/1,334,529.60 = 258,620.80/x
  3. Step 3: Cross multiply
    889,772.80x = 1,334,529.60 × 258,620.80
  4. Step 4: Simplify right side
    889,772.80x = 345,137,112,775.68
  5. Step 5: Solve for x
    x = 345,137,112,775.68/889,772.80
  6. Step 6: Final answer
    x = 387,893.53

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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.