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Finding the Fourth Proportional to 691,671.56, 954,580.14 and 405,432.14

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Solution

The fourth proportional to 691,671.56, 954,580.14 and 405,432.14 is: 559,539.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,671.56 : 954,580.14 = 405,432.14 : x
  2. Step 2: Convert to fraction form
    691,671.56/954,580.14 = 405,432.14/x
  3. Step 3: Cross multiply
    691,671.56x = 954,580.14 × 405,432.14
  4. Step 4: Simplify right side
    691,671.56x = 387,017,468,961.70
  5. Step 5: Solve for x
    x = 387,017,468,961.70/691,671.56
  6. Step 6: Final answer
    x = 559,539.37

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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.