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Finding the Fourth Proportional to 309,504.69, 426,959.28 and 202,137.57

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Solution

The fourth proportional to 309,504.69, 426,959.28 and 202,137.57 is: 278,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,504.69 : 426,959.28 = 202,137.57 : x
  2. Step 2: Convert to fraction form
    309,504.69/426,959.28 = 202,137.57/x
  3. Step 3: Cross multiply
    309,504.69x = 426,959.28 × 202,137.57
  4. Step 4: Simplify right side
    309,504.69x = 86,304,511,348.15
  5. Step 5: Solve for x
    x = 86,304,511,348.15/309,504.69
  6. Step 6: Final answer
    x = 278,847.18

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1.5x scale

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.