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Finding the Fourth Proportional to 613,399.20, 920,127.60 and 192,688.80

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Solution

The fourth proportional to 613,399.20, 920,127.60 and 192,688.80 is: 289,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,399.20 : 920,127.60 = 192,688.80 : x
  2. Step 2: Convert to fraction form
    613,399.20/920,127.60 = 192,688.80/x
  3. Step 3: Cross multiply
    613,399.20x = 920,127.60 × 192,688.80
  4. Step 4: Simplify right side
    613,399.20x = 177,298,283,090.88
  5. Step 5: Solve for x
    x = 177,298,283,090.88/613,399.20
  6. Step 6: Final answer
    x = 289,042.25

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1.5x scale

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.