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Finding the Fourth Proportional to 318,414.40, 476,930.40 and 263,118.40

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Solution

The fourth proportional to 318,414.40, 476,930.40 and 263,118.40 is: 394,106.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,414.40 : 476,930.40 = 263,118.40 : x
  2. Step 2: Convert to fraction form
    318,414.40/476,930.40 = 263,118.40/x
  3. Step 3: Cross multiply
    318,414.40x = 476,930.40 × 263,118.40
  4. Step 4: Simplify right side
    318,414.40x = 125,489,163,759.36
  5. Step 5: Solve for x
    x = 125,489,163,759.36/318,414.40
  6. Step 6: Final answer
    x = 394,106.43

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1.5x scale

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.