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Finding the Fourth Proportional to 889,720.80, 1,334,451.60 and 258,568.80

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Solution

The fourth proportional to 889,720.80, 1,334,451.60 and 258,568.80 is: 387,815.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    889,720.80 : 1,334,451.60 = 258,568.80 : x
  2. Step 2: Convert to fraction form
    889,720.80/1,334,451.60 = 258,568.80/x
  3. Step 3: Cross multiply
    889,720.80x = 1,334,451.60 × 258,568.80
  4. Step 4: Simplify right side
    889,720.80x = 345,047,548,870.08
  5. Step 5: Solve for x
    x = 345,047,548,870.08/889,720.80
  6. Step 6: Final answer
    x = 387,815.54

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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.