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Finding the Fourth Proportional to 657,174.78, 906,991.98 and 385,309.62

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Solution

The fourth proportional to 657,174.78, 906,991.98 and 385,309.62 is: 531,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,174.78 : 906,991.98 = 385,309.62 : x
  2. Step 2: Convert to fraction form
    657,174.78/906,991.98 = 385,309.62/x
  3. Step 3: Cross multiply
    657,174.78x = 906,991.98 × 385,309.62
  4. Step 4: Simplify right side
    657,174.78x = 349,472,735,156.85
  5. Step 5: Solve for x
    x = 349,472,735,156.85/657,174.78
  6. Step 6: Final answer
    x = 531,780.50

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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.