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Finding the Fourth Proportional to 518,664.87, 777,997.31 and 139,586.46

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Solution

The fourth proportional to 518,664.87, 777,997.31 and 139,586.46 is: 209,379.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,664.87 : 777,997.31 = 139,586.46 : x
  2. Step 2: Convert to fraction form
    518,664.87/777,997.31 = 139,586.46/x
  3. Step 3: Cross multiply
    518,664.87x = 777,997.31 × 139,586.46
  4. Step 4: Simplify right side
    518,664.87x = 108,597,886,777.00
  5. Step 5: Solve for x
    x = 108,597,886,777.00/518,664.87
  6. Step 6: Final answer
    x = 209,379.68

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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.