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Finding the Fourth Proportional to 279,860.40, 419,790.60 and 264,697.20

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Solution

The fourth proportional to 279,860.40, 419,790.60 and 264,697.20 is: 397,045.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,860.40 : 419,790.60 = 264,697.20 : x
  2. Step 2: Convert to fraction form
    279,860.40/419,790.60 = 264,697.20/x
  3. Step 3: Cross multiply
    279,860.40x = 419,790.60 × 264,697.20
  4. Step 4: Simplify right side
    279,860.40x = 111,117,396,406.32
  5. Step 5: Solve for x
    x = 111,117,396,406.32/279,860.40
  6. Step 6: Final answer
    x = 397,045.80

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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.