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Finding the Fourth Proportional to 266,066.20, 399,099.30 and 206,579.80

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Solution

The fourth proportional to 266,066.20, 399,099.30 and 206,579.80 is: 309,869.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,066.20 : 399,099.30 = 206,579.80 : x
  2. Step 2: Convert to fraction form
    266,066.20/399,099.30 = 206,579.80/x
  3. Step 3: Cross multiply
    266,066.20x = 399,099.30 × 206,579.80
  4. Step 4: Simplify right side
    266,066.20x = 82,445,853,574.14
  5. Step 5: Solve for x
    x = 82,445,853,574.14/266,066.20
  6. Step 6: Final answer
    x = 309,869.70

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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.