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Finding the Fourth Proportional to 256,123.80, 384,185.70 and 163,042.20

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Solution

The fourth proportional to 256,123.80, 384,185.70 and 163,042.20 is: 244,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,123.80 : 384,185.70 = 163,042.20 : x
  2. Step 2: Convert to fraction form
    256,123.80/384,185.70 = 163,042.20/x
  3. Step 3: Cross multiply
    256,123.80x = 384,185.70 × 163,042.20
  4. Step 4: Simplify right side
    256,123.80x = 62,638,481,736.54
  5. Step 5: Solve for x
    x = 62,638,481,736.54/256,123.80
  6. Step 6: Final answer
    x = 244,563.30

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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.