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Finding the Fourth Proportional to 619,022.76, 853,888.69 and 389,215.88

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Solution

The fourth proportional to 619,022.76, 853,888.69 and 389,215.88 is: 536,889.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,022.76 : 853,888.69 = 389,215.88 : x
  2. Step 2: Convert to fraction form
    619,022.76/853,888.69 = 389,215.88/x
  3. Step 3: Cross multiply
    619,022.76x = 853,888.69 × 389,215.88
  4. Step 4: Simplify right side
    619,022.76x = 332,347,039,933.34
  5. Step 5: Solve for x
    x = 332,347,039,933.34/619,022.76
  6. Step 6: Final answer
    x = 536,889.86

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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.