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Finding the Fourth Proportional to 206,860.40, 310,444.20 and 82,290.80

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Solution

The fourth proportional to 206,860.40, 310,444.20 and 82,290.80 is: 123,497.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,860.40 : 310,444.20 = 82,290.80 : x
  2. Step 2: Convert to fraction form
    206,860.40/310,444.20 = 82,290.80/x
  3. Step 3: Cross multiply
    206,860.40x = 310,444.20 × 82,290.80
  4. Step 4: Simplify right side
    206,860.40x = 25,546,701,573.36
  5. Step 5: Solve for x
    x = 25,546,701,573.36/206,860.40
  6. Step 6: Final answer
    x = 123,497.30

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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.