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Finding the Fourth Proportional to 263,286.90, 394,971.30 and 85,752.60

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Solution

The fourth proportional to 263,286.90, 394,971.30 and 85,752.60 is: 128,642.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,286.90 : 394,971.30 = 85,752.60 : x
  2. Step 2: Convert to fraction form
    263,286.90/394,971.30 = 85,752.60/x
  3. Step 3: Cross multiply
    263,286.90x = 394,971.30 × 85,752.60
  4. Step 4: Simplify right side
    263,286.90x = 33,869,815,900.38
  5. Step 5: Solve for x
    x = 33,869,815,900.38/263,286.90
  6. Step 6: Final answer
    x = 128,642.24

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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.