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Finding the Fourth Proportional to 624,128.54, 861,321.78 and 365,969.57

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Solution

The fourth proportional to 624,128.54, 861,321.78 and 365,969.57 is: 505,052.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,128.54 : 861,321.78 = 365,969.57 : x
  2. Step 2: Convert to fraction form
    624,128.54/861,321.78 = 365,969.57/x
  3. Step 3: Cross multiply
    624,128.54x = 861,321.78 × 365,969.57
  4. Step 4: Simplify right side
    624,128.54x = 315,217,557,151.63
  5. Step 5: Solve for x
    x = 315,217,557,151.63/624,128.54
  6. Step 6: Final answer
    x = 505,052.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.