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Finding the Fourth Proportional to 399,042.04, 550,231.48 and 326,217.64

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Solution

The fourth proportional to 399,042.04, 550,231.48 and 326,217.64 is: 449,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,042.04 : 550,231.48 = 326,217.64 : x
  2. Step 2: Convert to fraction form
    399,042.04/550,231.48 = 326,217.64/x
  3. Step 3: Cross multiply
    399,042.04x = 550,231.48 × 326,217.64
  4. Step 4: Simplify right side
    399,042.04x = 179,495,214,859.31
  5. Step 5: Solve for x
    x = 179,495,214,859.31/399,042.04
  6. Step 6: Final answer
    x = 449,815.30

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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.