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Finding the Fourth Proportional to 813,571.60, 1,220,344.32 and 252,606.64

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Solution

The fourth proportional to 813,571.60, 1,220,344.32 and 252,606.64 is: 378,905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,571.60 : 1,220,344.32 = 252,606.64 : x
  2. Step 2: Convert to fraction form
    813,571.60/1,220,344.32 = 252,606.64/x
  3. Step 3: Cross multiply
    813,571.60x = 1,220,344.32 × 252,606.64
  4. Step 4: Simplify right side
    813,571.60x = 308,267,078,318.29
  5. Step 5: Solve for x
    x = 308,267,078,318.29/813,571.60
  6. Step 6: Final answer
    x = 378,905.90

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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.