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Finding the Fourth Proportional to 389,861.82, 538,010.93 and 211,013.82

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Solution

The fourth proportional to 389,861.82, 538,010.93 and 211,013.82 is: 291,199.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,861.82 : 538,010.93 = 211,013.82 : x
  2. Step 2: Convert to fraction form
    389,861.82/538,010.93 = 211,013.82/x
  3. Step 3: Cross multiply
    389,861.82x = 538,010.93 × 211,013.82
  4. Step 4: Simplify right side
    389,861.82x = 113,527,740,485.98
  5. Step 5: Solve for x
    x = 113,527,740,485.98/389,861.82
  6. Step 6: Final answer
    x = 291,199.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.