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Finding the Fourth Proportional to 260,899.40, 391,640.70 and 201,996.20

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Solution

The fourth proportional to 260,899.40, 391,640.70 and 201,996.20 is: 303,220.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,899.40 : 391,640.70 = 201,996.20 : x
  2. Step 2: Convert to fraction form
    260,899.40/391,640.70 = 201,996.20/x
  3. Step 3: Cross multiply
    260,899.40x = 391,640.70 × 201,996.20
  4. Step 4: Simplify right side
    260,899.40x = 79,109,933,165.34
  5. Step 5: Solve for x
    x = 79,109,933,165.34/260,899.40
  6. Step 6: Final answer
    x = 303,220.07

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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.