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Finding the Fourth Proportional to 220,087.80, 330,131.70 and 205,216.20

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Solution

The fourth proportional to 220,087.80, 330,131.70 and 205,216.20 is: 307,824.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,087.80 : 330,131.70 = 205,216.20 : x
  2. Step 2: Convert to fraction form
    220,087.80/330,131.70 = 205,216.20/x
  3. Step 3: Cross multiply
    220,087.80x = 330,131.70 × 205,216.20
  4. Step 4: Simplify right side
    220,087.80x = 67,748,372,973.54
  5. Step 5: Solve for x
    x = 67,748,372,973.54/220,087.80
  6. Step 6: Final answer
    x = 307,824.30

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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.