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Finding the Fourth Proportional to 438,687.81, 605,400.20 and 247,702.58

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Solution

The fourth proportional to 438,687.81, 605,400.20 and 247,702.58 is: 341,835.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,687.81 : 605,400.20 = 247,702.58 : x
  2. Step 2: Convert to fraction form
    438,687.81/605,400.20 = 247,702.58/x
  3. Step 3: Cross multiply
    438,687.81x = 605,400.20 × 247,702.58
  4. Step 4: Simplify right side
    438,687.81x = 149,959,187,207.00
  5. Step 5: Solve for x
    x = 149,959,187,207.00/438,687.81
  6. Step 6: Final answer
    x = 341,835.77

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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.