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Finding the Fourth Proportional to 379,664.70, 524,039.67 and 218,571.90

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Solution

The fourth proportional to 379,664.70, 524,039.67 and 218,571.90 is: 301,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,664.70 : 524,039.67 = 218,571.90 : x
  2. Step 2: Convert to fraction form
    379,664.70/524,039.67 = 218,571.90/x
  3. Step 3: Cross multiply
    379,664.70x = 524,039.67 × 218,571.90
  4. Step 4: Simplify right side
    379,664.70x = 114,540,346,347.27
  5. Step 5: Solve for x
    x = 114,540,346,347.27/379,664.70
  6. Step 6: Final answer
    x = 301,688.16

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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.