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Finding the Fourth Proportional to 624,551, 861,997.14 and 356,279

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Solution

The fourth proportional to 624,551, 861,997.14 and 356,279 is: 491,731.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,551 : 861,997.14 = 356,279 : x
  2. Step 2: Convert to fraction form
    624,551/861,997.14 = 356,279/x
  3. Step 3: Cross multiply
    624,551x = 861,997.14 × 356,279
  4. Step 4: Simplify right side
    624,551x = 307,111,479,042.06
  5. Step 5: Solve for x
    x = 307,111,479,042.06/624,551
  6. Step 6: Final answer
    x = 491,731.63

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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.