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Finding the Fourth Proportional to 256,636.80, 384,517.80 and 219,020.40

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Solution

The fourth proportional to 256,636.80, 384,517.80 and 219,020.40 is: 328,157.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,636.80 : 384,517.80 = 219,020.40 : x
  2. Step 2: Convert to fraction form
    256,636.80/384,517.80 = 219,020.40/x
  3. Step 3: Cross multiply
    256,636.80x = 384,517.80 × 219,020.40
  4. Step 4: Simplify right side
    256,636.80x = 84,217,242,363.12
  5. Step 5: Solve for x
    x = 84,217,242,363.12/256,636.80
  6. Step 6: Final answer
    x = 328,157.31

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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.