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Finding the Fourth Proportional to 492,664.98, 679,897.83 and 311,310.73

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Solution

The fourth proportional to 492,664.98, 679,897.83 and 311,310.73 is: 429,621.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,664.98 : 679,897.83 = 311,310.73 : x
  2. Step 2: Convert to fraction form
    492,664.98/679,897.83 = 311,310.73/x
  3. Step 3: Cross multiply
    492,664.98x = 679,897.83 × 311,310.73
  4. Step 4: Simplify right side
    492,664.98x = 211,659,489,782.72
  5. Step 5: Solve for x
    x = 211,659,489,782.72/492,664.98
  6. Step 6: Final answer
    x = 429,621.54

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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.