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Finding the Fourth Proportional to 256,276.20, 384,414.30 and 66,736.20

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Solution

The fourth proportional to 256,276.20, 384,414.30 and 66,736.20 is: 100,104.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,276.20 : 384,414.30 = 66,736.20 : x
  2. Step 2: Convert to fraction form
    256,276.20/384,414.30 = 66,736.20/x
  3. Step 3: Cross multiply
    256,276.20x = 384,414.30 × 66,736.20
  4. Step 4: Simplify right side
    256,276.20x = 25,654,349,607.66
  5. Step 5: Solve for x
    x = 25,654,349,607.66/256,276.20
  6. Step 6: Final answer
    x = 100,104.30

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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.