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Finding the Fourth Proportional to 621,437.34, 857,725.11 and 439,960.62

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Solution

The fourth proportional to 621,437.34, 857,725.11 and 439,960.62 is: 607,245.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,437.34 : 857,725.11 = 439,960.62 : x
  2. Step 2: Convert to fraction form
    621,437.34/857,725.11 = 439,960.62/x
  3. Step 3: Cross multiply
    621,437.34x = 857,725.11 × 439,960.62
  4. Step 4: Simplify right side
    621,437.34x = 377,365,271,185.17
  5. Step 5: Solve for x
    x = 377,365,271,185.17/621,437.34
  6. Step 6: Final answer
    x = 607,245.89

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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.