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Finding the Fourth Proportional to 310,540.50, 428,871.17 and 213,995.39

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Solution

The fourth proportional to 310,540.50, 428,871.17 and 213,995.39 is: 295,537.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,540.50 : 428,871.17 = 213,995.39 : x
  2. Step 2: Convert to fraction form
    310,540.50/428,871.17 = 213,995.39/x
  3. Step 3: Cross multiply
    310,540.50x = 428,871.17 × 213,995.39
  4. Step 4: Simplify right side
    310,540.50x = 91,776,451,674.54
  5. Step 5: Solve for x
    x = 91,776,451,674.54/310,540.50
  6. Step 6: Final answer
    x = 295,537.79

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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.