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Finding the Fourth Proportional to 543,580.63, 815,186.39 and 206,540.30

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Solution

The fourth proportional to 543,580.63, 815,186.39 and 206,540.30 is: 309,740.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,580.63 : 815,186.39 = 206,540.30 : x
  2. Step 2: Convert to fraction form
    543,580.63/815,186.39 = 206,540.30/x
  3. Step 3: Cross multiply
    543,580.63x = 815,186.39 × 206,540.30
  4. Step 4: Simplify right side
    543,580.63x = 168,368,842,551.78
  5. Step 5: Solve for x
    x = 168,368,842,551.78/543,580.63
  6. Step 6: Final answer
    x = 309,740.33

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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.