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Finding the Fourth Proportional to 256,519.82, 353,996.78 and 143,342.58

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Solution

The fourth proportional to 256,519.82, 353,996.78 and 143,342.58 is: 197,812.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,519.82 : 353,996.78 = 143,342.58 : x
  2. Step 2: Convert to fraction form
    256,519.82/353,996.78 = 143,342.58/x
  3. Step 3: Cross multiply
    256,519.82x = 353,996.78 × 143,342.58
  4. Step 4: Simplify right side
    256,519.82x = 50,742,811,756.89
  5. Step 5: Solve for x
    x = 50,742,811,756.89/256,519.82
  6. Step 6: Final answer
    x = 197,812.44

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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.