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Finding the Fourth Proportional to 279,862.80, 419,794.20 and 256,243.20

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Solution

The fourth proportional to 279,862.80, 419,794.20 and 256,243.20 is: 384,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,862.80 : 419,794.20 = 256,243.20 : x
  2. Step 2: Convert to fraction form
    279,862.80/419,794.20 = 256,243.20/x
  3. Step 3: Cross multiply
    279,862.80x = 419,794.20 × 256,243.20
  4. Step 4: Simplify right side
    279,862.80x = 107,569,409,149.44
  5. Step 5: Solve for x
    x = 107,569,409,149.44/279,862.80
  6. Step 6: Final answer
    x = 384,364.80

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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.