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Finding the Fourth Proportional to 712,164.50, 982,787.01 and 394,212.50

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Solution

The fourth proportional to 712,164.50, 982,787.01 and 394,212.50 is: 544,013.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,164.50 : 982,787.01 = 394,212.50 : x
  2. Step 2: Convert to fraction form
    712,164.50/982,787.01 = 394,212.50/x
  3. Step 3: Cross multiply
    712,164.50x = 982,787.01 × 394,212.50
  4. Step 4: Simplify right side
    712,164.50x = 387,426,924,179.63
  5. Step 5: Solve for x
    x = 387,426,924,179.63/712,164.50
  6. Step 6: Final answer
    x = 544,013.25

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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.