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Finding the Fourth Proportional to 256,412.60, 384,618.90 and 185,553.80

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Solution

The fourth proportional to 256,412.60, 384,618.90 and 185,553.80 is: 278,330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,412.60 : 384,618.90 = 185,553.80 : x
  2. Step 2: Convert to fraction form
    256,412.60/384,618.90 = 185,553.80/x
  3. Step 3: Cross multiply
    256,412.60x = 384,618.90 × 185,553.80
  4. Step 4: Simplify right side
    256,412.60x = 71,367,498,446.82
  5. Step 5: Solve for x
    x = 71,367,498,446.82/256,412.60
  6. Step 6: Final answer
    x = 278,330.70

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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.