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Finding the Fourth Proportional to 621,461.44, 857,682.59 and 379,885.42

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Solution

The fourth proportional to 621,461.44, 857,682.59 and 379,885.42 is: 524,282.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,461.44 : 857,682.59 = 379,885.42 : x
  2. Step 2: Convert to fraction form
    621,461.44/857,682.59 = 379,885.42/x
  3. Step 3: Cross multiply
    621,461.44x = 857,682.59 × 379,885.42
  4. Step 4: Simplify right side
    621,461.44x = 325,821,110,928.84
  5. Step 5: Solve for x
    x = 325,821,110,928.84/621,461.44
  6. Step 6: Final answer
    x = 524,282.10

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Double scale
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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.