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Finding the Fourth Proportional to 621,672.81, 932,509.22 and 411,261.54

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Solution

The fourth proportional to 621,672.81, 932,509.22 and 411,261.54 is: 616,892.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,672.81 : 932,509.22 = 411,261.54 : x
  2. Step 2: Convert to fraction form
    621,672.81/932,509.22 = 411,261.54/x
  3. Step 3: Cross multiply
    621,672.81x = 932,509.22 × 411,261.54
  4. Step 4: Simplify right side
    621,672.81x = 383,505,175,825.09
  5. Step 5: Solve for x
    x = 383,505,175,825.09/621,672.81
  6. Step 6: Final answer
    x = 616,892.31

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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.