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Finding the Fourth Proportional to 665,172.60, 997,661.70 and 191,808.60

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Solution

The fourth proportional to 665,172.60, 997,661.70 and 191,808.60 is: 287,684.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,172.60 : 997,661.70 = 191,808.60 : x
  2. Step 2: Convert to fraction form
    665,172.60/997,661.70 = 191,808.60/x
  3. Step 3: Cross multiply
    665,172.60x = 997,661.70 × 191,808.60
  4. Step 4: Simplify right side
    665,172.60x = 191,360,093,950.62
  5. Step 5: Solve for x
    x = 191,360,093,950.62/665,172.60
  6. Step 6: Final answer
    x = 287,684.87

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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.