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Finding the Fourth Proportional to 681,426.56, 939,854.40 and 641,244.80

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Solution

The fourth proportional to 681,426.56, 939,854.40 and 641,244.80 is: 884,433.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,426.56 : 939,854.40 = 641,244.80 : x
  2. Step 2: Convert to fraction form
    681,426.56/939,854.40 = 641,244.80/x
  3. Step 3: Cross multiply
    681,426.56x = 939,854.40 × 641,244.80
  4. Step 4: Simplify right side
    681,426.56x = 602,676,746,757.12
  5. Step 5: Solve for x
    x = 602,676,746,757.12/681,426.56
  6. Step 6: Final answer
    x = 884,433.90

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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.