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Finding the Fourth Proportional to 557,912.35, 770,003.21 and 340,247.31

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Solution

The fourth proportional to 557,912.35, 770,003.21 and 340,247.31 is: 469,592.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,912.35 : 770,003.21 = 340,247.31 : x
  2. Step 2: Convert to fraction form
    557,912.35/770,003.21 = 340,247.31/x
  3. Step 3: Cross multiply
    557,912.35x = 770,003.21 × 340,247.31
  4. Step 4: Simplify right side
    557,912.35x = 261,991,520,893.87
  5. Step 5: Solve for x
    x = 261,991,520,893.87/557,912.35
  6. Step 6: Final answer
    x = 469,592.62

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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.