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Finding the Fourth Proportional to 220,144.80, 330,217.20 and 218,762.40

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Solution

The fourth proportional to 220,144.80, 330,217.20 and 218,762.40 is: 328,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,144.80 : 330,217.20 = 218,762.40 : x
  2. Step 2: Convert to fraction form
    220,144.80/330,217.20 = 218,762.40/x
  3. Step 3: Cross multiply
    220,144.80x = 330,217.20 × 218,762.40
  4. Step 4: Simplify right side
    220,144.80x = 72,239,107,193.28
  5. Step 5: Solve for x
    x = 72,239,107,193.28/220,144.80
  6. Step 6: Final answer
    x = 328,143.60

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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.