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Finding the Fourth Proportional to 279,863.80, 419,795.70 and 256,244.20

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Solution

The fourth proportional to 279,863.80, 419,795.70 and 256,244.20 is: 384,366.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,863.80 : 419,795.70 = 256,244.20 : x
  2. Step 2: Convert to fraction form
    279,863.80/419,795.70 = 256,244.20/x
  3. Step 3: Cross multiply
    279,863.80x = 419,795.70 × 256,244.20
  4. Step 4: Simplify right side
    279,863.80x = 107,570,213,309.94
  5. Step 5: Solve for x
    x = 107,570,213,309.94/279,863.80
  6. Step 6: Final answer
    x = 384,366.30

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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.