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Finding the Fourth Proportional to 691,974.32, 954,704.76 and 405,402.80

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Solution

The fourth proportional to 691,974.32, 954,704.76 and 405,402.80 is: 559,327.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,974.32 : 954,704.76 = 405,402.80 : x
  2. Step 2: Convert to fraction form
    691,974.32/954,704.76 = 405,402.80/x
  3. Step 3: Cross multiply
    691,974.32x = 954,704.76 × 405,402.80
  4. Step 4: Simplify right side
    691,974.32x = 387,039,982,877.33
  5. Step 5: Solve for x
    x = 387,039,982,877.33/691,974.32
  6. Step 6: Final answer
    x = 559,327.09

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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.