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Finding the Fourth Proportional to 665,136.60, 997,542.90 and 191,772.60

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Solution

The fourth proportional to 665,136.60, 997,542.90 and 191,772.60 is: 287,612.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,136.60 : 997,542.90 = 191,772.60 : x
  2. Step 2: Convert to fraction form
    665,136.60/997,542.90 = 191,772.60/x
  3. Step 3: Cross multiply
    665,136.60x = 997,542.90 × 191,772.60
  4. Step 4: Simplify right side
    665,136.60x = 191,301,395,544.54
  5. Step 5: Solve for x
    x = 191,301,395,544.54/665,136.60
  6. Step 6: Final answer
    x = 287,612.19

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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.