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Finding the Fourth Proportional to 262,859.20, 394,029.60 and 129,630.40

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Solution

The fourth proportional to 262,859.20, 394,029.60 and 129,630.40 is: 194,317.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,859.20 : 394,029.60 = 129,630.40 : x
  2. Step 2: Convert to fraction form
    262,859.20/394,029.60 = 129,630.40/x
  3. Step 3: Cross multiply
    262,859.20x = 394,029.60 × 129,630.40
  4. Step 4: Simplify right side
    262,859.20x = 51,078,214,659.84
  5. Step 5: Solve for x
    x = 51,078,214,659.84/262,859.20
  6. Step 6: Final answer
    x = 194,317.77

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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.