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Finding the Fourth Proportional to 543,207.80, 815,426.10 and 321,716.60

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Solution

The fourth proportional to 543,207.80, 815,426.10 and 321,716.60 is: 482,938.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,207.80 : 815,426.10 = 321,716.60 : x
  2. Step 2: Convert to fraction form
    543,207.80/815,426.10 = 321,716.60/x
  3. Step 3: Cross multiply
    543,207.80x = 815,426.10 × 321,716.60
  4. Step 4: Simplify right side
    543,207.80x = 262,336,112,443.26
  5. Step 5: Solve for x
    x = 262,336,112,443.26/543,207.80
  6. Step 6: Final answer
    x = 482,938.78

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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.