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Finding the Fourth Proportional to 220,839.80, 331,259.70 and 199,412.60

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Solution

The fourth proportional to 220,839.80, 331,259.70 and 199,412.60 is: 299,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,839.80 : 331,259.70 = 199,412.60 : x
  2. Step 2: Convert to fraction form
    220,839.80/331,259.70 = 199,412.60/x
  3. Step 3: Cross multiply
    220,839.80x = 331,259.70 × 199,412.60
  4. Step 4: Simplify right side
    220,839.80x = 66,057,358,052.22
  5. Step 5: Solve for x
    x = 66,057,358,052.22/220,839.80
  6. Step 6: Final answer
    x = 299,118.90

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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.