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Finding the Fourth Proportional to 220,605.40, 330,713.70 and 131,764.60

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Solution

The fourth proportional to 220,605.40, 330,713.70 and 131,764.60 is: 197,530.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,605.40 : 330,713.70 = 131,764.60 : x
  2. Step 2: Convert to fraction form
    220,605.40/330,713.70 = 131,764.60/x
  3. Step 3: Cross multiply
    220,605.40x = 330,713.70 × 131,764.60
  4. Step 4: Simplify right side
    220,605.40x = 43,576,358,395.02
  5. Step 5: Solve for x
    x = 43,576,358,395.02/220,605.40
  6. Step 6: Final answer
    x = 197,530.79

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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.