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Finding the Fourth Proportional to 613,211.40, 919,964.16 and 192,487.32

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Solution

The fourth proportional to 613,211.40, 919,964.16 and 192,487.32 is: 288,777.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,211.40 : 919,964.16 = 192,487.32 : x
  2. Step 2: Convert to fraction form
    613,211.40/919,964.16 = 192,487.32/x
  3. Step 3: Cross multiply
    613,211.40x = 919,964.16 × 192,487.32
  4. Step 4: Simplify right side
    613,211.40x = 177,081,435,654.45
  5. Step 5: Solve for x
    x = 177,081,435,654.45/613,211.40
  6. Step 6: Final answer
    x = 288,777.14

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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.