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Finding the Fourth Proportional to 281,411.20, 422,116.80 and 262,979.20

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Solution

The fourth proportional to 281,411.20, 422,116.80 and 262,979.20 is: 394,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,411.20 : 422,116.80 = 262,979.20 : x
  2. Step 2: Convert to fraction form
    281,411.20/422,116.80 = 262,979.20/x
  3. Step 3: Cross multiply
    281,411.20x = 422,116.80 × 262,979.20
  4. Step 4: Simplify right side
    281,411.20x = 111,007,938,370.56
  5. Step 5: Solve for x
    x = 111,007,938,370.56/281,411.20
  6. Step 6: Final answer
    x = 394,468.80

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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.