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Finding the Fourth Proportional to 256,446.20, 384,669.30 and 66,906.20

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Solution

The fourth proportional to 256,446.20, 384,669.30 and 66,906.20 is: 100,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,446.20 : 384,669.30 = 66,906.20 : x
  2. Step 2: Convert to fraction form
    256,446.20/384,669.30 = 66,906.20/x
  3. Step 3: Cross multiply
    256,446.20x = 384,669.30 × 66,906.20
  4. Step 4: Simplify right side
    256,446.20x = 25,736,761,119.66
  5. Step 5: Solve for x
    x = 25,736,761,119.66/256,446.20
  6. Step 6: Final answer
    x = 100,359.30

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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.