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Finding the Fourth Proportional to 206,854.40, 310,435.20 and 82,284.80

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Solution

The fourth proportional to 206,854.40, 310,435.20 and 82,284.80 is: 123,488.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,854.40 : 310,435.20 = 82,284.80 : x
  2. Step 2: Convert to fraction form
    206,854.40/310,435.20 = 82,284.80/x
  3. Step 3: Cross multiply
    206,854.40x = 310,435.20 × 82,284.80
  4. Step 4: Simplify right side
    206,854.40x = 25,544,098,344.96
  5. Step 5: Solve for x
    x = 25,544,098,344.96/206,854.40
  6. Step 6: Final answer
    x = 123,488.30

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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.