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Finding the Fourth Proportional to 279,639.20, 419,458.80 and 200,907.20

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Solution

The fourth proportional to 279,639.20, 419,458.80 and 200,907.20 is: 301,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,639.20 : 419,458.80 = 200,907.20 : x
  2. Step 2: Convert to fraction form
    279,639.20/419,458.80 = 200,907.20/x
  3. Step 3: Cross multiply
    279,639.20x = 419,458.80 × 200,907.20
  4. Step 4: Simplify right side
    279,639.20x = 84,272,293,023.36
  5. Step 5: Solve for x
    x = 84,272,293,023.36/279,639.20
  6. Step 6: Final answer
    x = 301,360.80

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1.5x scale

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.