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Finding the Fourth Proportional to 515,295.58, 711,114.90 and 386,005

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Solution

The fourth proportional to 515,295.58, 711,114.90 and 386,005 is: 532,692.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,295.58 : 711,114.90 = 386,005 : x
  2. Step 2: Convert to fraction form
    515,295.58/711,114.90 = 386,005/x
  3. Step 3: Cross multiply
    515,295.58x = 711,114.90 × 386,005
  4. Step 4: Simplify right side
    515,295.58x = 274,493,906,974.50
  5. Step 5: Solve for x
    x = 274,493,906,974.50/515,295.58
  6. Step 6: Final answer
    x = 532,692.14

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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.