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Finding the Fourth Proportional to 691,722.56, 954,790.26 and 405,335.72

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Solution

The fourth proportional to 691,722.56, 954,790.26 and 405,335.72 is: 559,488.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,722.56 : 954,790.26 = 405,335.72 : x
  2. Step 2: Convert to fraction form
    691,722.56/954,790.26 = 405,335.72/x
  3. Step 3: Cross multiply
    691,722.56x = 954,790.26 × 405,335.72
  4. Step 4: Simplify right side
    691,722.56x = 387,010,597,486.09
  5. Step 5: Solve for x
    x = 387,010,597,486.09/691,722.56
  6. Step 6: Final answer
    x = 559,488.18

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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.