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Finding the Fourth Proportional to 262,808.60, 394,115.70 and 85,321.40

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Solution

The fourth proportional to 262,808.60, 394,115.70 and 85,321.40 is: 127,950.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,808.60 : 394,115.70 = 85,321.40 : x
  2. Step 2: Convert to fraction form
    262,808.60/394,115.70 = 85,321.40/x
  3. Step 3: Cross multiply
    262,808.60x = 394,115.70 × 85,321.40
  4. Step 4: Simplify right side
    262,808.60x = 33,626,503,285.98
  5. Step 5: Solve for x
    x = 33,626,503,285.98/262,808.60
  6. Step 6: Final answer
    x = 127,950.54

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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.