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Finding the Fourth Proportional to 621,461.56, 857,682.76 and 379,885.54

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Solution

The fourth proportional to 621,461.56, 857,682.76 and 379,885.54 is: 524,282.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,461.56 : 857,682.76 = 379,885.54 : x
  2. Step 2: Convert to fraction form
    621,461.56/857,682.76 = 379,885.54/x
  3. Step 3: Cross multiply
    621,461.56x = 857,682.76 × 379,885.54
  4. Step 4: Simplify right side
    621,461.56x = 325,821,275,337.37
  5. Step 5: Solve for x
    x = 325,821,275,337.37/621,461.56
  6. Step 6: Final answer
    x = 524,282.27

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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.