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Finding the Fourth Proportional to 611,388.96, 917,112.88 and 256,414.56

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Solution

The fourth proportional to 611,388.96, 917,112.88 and 256,414.56 is: 384,634.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,388.96 : 917,112.88 = 256,414.56 : x
  2. Step 2: Convert to fraction form
    611,388.96/917,112.88 = 256,414.56/x
  3. Step 3: Cross multiply
    611,388.96x = 917,112.88 × 256,414.56
  4. Step 4: Simplify right side
    611,388.96x = 235,161,095,595.53
  5. Step 5: Solve for x
    x = 235,161,095,595.53/611,388.96
  6. Step 6: Final answer
    x = 384,634.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.