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Finding the Fourth Proportional to 511,236.90, 705,478.41 and 281,749.32

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Solution

The fourth proportional to 511,236.90, 705,478.41 and 281,749.32 is: 388,798.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,236.90 : 705,478.41 = 281,749.32 : x
  2. Step 2: Convert to fraction form
    511,236.90/705,478.41 = 281,749.32/x
  3. Step 3: Cross multiply
    511,236.90x = 705,478.41 × 281,749.32
  4. Step 4: Simplify right side
    511,236.90x = 198,768,062,292.18
  5. Step 5: Solve for x
    x = 198,768,062,292.18/511,236.90
  6. Step 6: Final answer
    x = 388,798.35

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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.