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Finding the Fourth Proportional to 619,117.48, 854,020.12 and 389,310.96

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Solution

The fourth proportional to 619,117.48, 854,020.12 and 389,310.96 is: 537,021.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,117.48 : 854,020.12 = 389,310.96 : x
  2. Step 2: Convert to fraction form
    619,117.48/854,020.12 = 389,310.96/x
  3. Step 3: Cross multiply
    619,117.48x = 854,020.12 × 389,310.96
  4. Step 4: Simplify right side
    619,117.48x = 332,479,392,776.52
  5. Step 5: Solve for x
    x = 332,479,392,776.52/619,117.48
  6. Step 6: Final answer
    x = 537,021.49

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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.