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Finding the Fourth Proportional to 262,785.40, 394,235.74 and 85,310.28

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Solution

The fourth proportional to 262,785.40, 394,235.74 and 85,310.28 is: 127,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,785.40 : 394,235.74 = 85,310.28 : x
  2. Step 2: Convert to fraction form
    262,785.40/394,235.74 = 85,310.28/x
  3. Step 3: Cross multiply
    262,785.40x = 394,235.74 × 85,310.28
  4. Step 4: Simplify right side
    262,785.40x = 33,632,361,365.41
  5. Step 5: Solve for x
    x = 33,632,361,365.41/262,785.40
  6. Step 6: Final answer
    x = 127,984.13

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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.