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Finding the Fourth Proportional to 618,845.40, 928,268.10 and 461,381.40

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Solution

The fourth proportional to 618,845.40, 928,268.10 and 461,381.40 is: 692,072.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,845.40 : 928,268.10 = 461,381.40 : x
  2. Step 2: Convert to fraction form
    618,845.40/928,268.10 = 461,381.40/x
  3. Step 3: Cross multiply
    618,845.40x = 928,268.10 × 461,381.40
  4. Step 4: Simplify right side
    618,845.40x = 428,285,635,553.34
  5. Step 5: Solve for x
    x = 428,285,635,553.34/618,845.40
  6. Step 6: Final answer
    x = 692,072.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.