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Finding the Fourth Proportional to 256,571.28, 384,893.16 and 79,092.72

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Solution

The fourth proportional to 256,571.28, 384,893.16 and 79,092.72 is: 118,650.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,571.28 : 384,893.16 = 79,092.72 : x
  2. Step 2: Convert to fraction form
    256,571.28/384,893.16 = 79,092.72/x
  3. Step 3: Cross multiply
    256,571.28x = 384,893.16 × 79,092.72
  4. Step 4: Simplify right side
    256,571.28x = 30,442,246,933.80
  5. Step 5: Solve for x
    x = 30,442,246,933.80/256,571.28
  6. Step 6: Final answer
    x = 118,650.25

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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.