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Finding the Fourth Proportional to 220,563.20, 330,844.80 and 210,425.60

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Solution

The fourth proportional to 220,563.20, 330,844.80 and 210,425.60 is: 315,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,563.20 : 330,844.80 = 210,425.60 : x
  2. Step 2: Convert to fraction form
    220,563.20/330,844.80 = 210,425.60/x
  3. Step 3: Cross multiply
    220,563.20x = 330,844.80 × 210,425.60
  4. Step 4: Simplify right side
    220,563.20x = 69,618,215,546.88
  5. Step 5: Solve for x
    x = 69,618,215,546.88/220,563.20
  6. Step 6: Final answer
    x = 315,638.40

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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.