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Finding the Fourth Proportional to 515,645.69, 711,576.54 and 283,072.56

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Solution

The fourth proportional to 515,645.69, 711,576.54 and 283,072.56 is: 390,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,645.69 : 711,576.54 = 283,072.56 : x
  2. Step 2: Convert to fraction form
    515,645.69/711,576.54 = 283,072.56/x
  3. Step 3: Cross multiply
    515,645.69x = 711,576.54 × 283,072.56
  4. Step 4: Simplify right side
    515,645.69x = 201,427,792,813.74
  5. Step 5: Solve for x
    x = 201,427,792,813.74/515,645.69
  6. Step 6: Final answer
    x = 390,632.17

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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.