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Finding the Fourth Proportional to 262,980.57, 394,512.36 and 85,446.12

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Solution

The fourth proportional to 262,980.57, 394,512.36 and 85,446.12 is: 128,182.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,980.57 : 394,512.36 = 85,446.12 : x
  2. Step 2: Convert to fraction form
    262,980.57/394,512.36 = 85,446.12/x
  3. Step 3: Cross multiply
    262,980.57x = 394,512.36 × 85,446.12
  4. Step 4: Simplify right side
    262,980.57x = 33,709,550,454.04
  5. Step 5: Solve for x
    x = 33,709,550,454.04/262,980.57
  6. Step 6: Final answer
    x = 128,182.67

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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.