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Finding the Fourth Proportional to 691,636.68, 954,535.86 and 405,398.88

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Solution

The fourth proportional to 691,636.68, 954,535.86 and 405,398.88 is: 559,495.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,636.68 : 954,535.86 = 405,398.88 : x
  2. Step 2: Convert to fraction form
    691,636.68/954,535.86 = 405,398.88/x
  3. Step 3: Cross multiply
    691,636.68x = 954,535.86 × 405,398.88
  4. Step 4: Simplify right side
    691,636.68x = 386,967,768,563.84
  5. Step 5: Solve for x
    x = 386,967,768,563.84/691,636.68
  6. Step 6: Final answer
    x = 559,495.73

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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.