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Finding the Fourth Proportional to 399,905.66, 548,932.23 and 353,568.60

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Solution

The fourth proportional to 399,905.66, 548,932.23 and 353,568.60 is: 485,327.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,905.66 : 548,932.23 = 353,568.60 : x
  2. Step 2: Convert to fraction form
    399,905.66/548,932.23 = 353,568.60/x
  3. Step 3: Cross multiply
    399,905.66x = 548,932.23 × 353,568.60
  4. Step 4: Simplify right side
    399,905.66x = 194,085,200,055.98
  5. Step 5: Solve for x
    x = 194,085,200,055.98/399,905.66
  6. Step 6: Final answer
    x = 485,327.46

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.