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Finding the Fourth Proportional to 666,299.09, 919,489.95 and 360,375.78

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Solution

The fourth proportional to 666,299.09, 919,489.95 and 360,375.78 is: 497,317.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,299.09 : 919,489.95 = 360,375.78 : x
  2. Step 2: Convert to fraction form
    666,299.09/919,489.95 = 360,375.78/x
  3. Step 3: Cross multiply
    666,299.09x = 919,489.95 × 360,375.78
  4. Step 4: Simplify right side
    666,299.09x = 331,361,907,933.41
  5. Step 5: Solve for x
    x = 331,361,907,933.41/666,299.09
  6. Step 6: Final answer
    x = 497,317.07

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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.