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Finding the Fourth Proportional to 262,880.80, 394,321.20 and 220,890.40

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Solution

The fourth proportional to 262,880.80, 394,321.20 and 220,890.40 is: 331,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,880.80 : 394,321.20 = 220,890.40 : x
  2. Step 2: Convert to fraction form
    262,880.80/394,321.20 = 220,890.40/x
  3. Step 3: Cross multiply
    262,880.80x = 394,321.20 × 220,890.40
  4. Step 4: Simplify right side
    262,880.80x = 87,101,767,596.48
  5. Step 5: Solve for x
    x = 87,101,767,596.48/262,880.80
  6. Step 6: Final answer
    x = 331,335.60

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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.