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Finding the Fourth Proportional to 266,687.40, 400,290.30 and 161,711.40

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Solution

The fourth proportional to 266,687.40, 400,290.30 and 161,711.40 is: 242,724.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,687.40 : 400,290.30 = 161,711.40 : x
  2. Step 2: Convert to fraction form
    266,687.40/400,290.30 = 161,711.40/x
  3. Step 3: Cross multiply
    266,687.40x = 400,290.30 × 161,711.40
  4. Step 4: Simplify right side
    266,687.40x = 64,731,504,819.42
  5. Step 5: Solve for x
    x = 64,731,504,819.42/266,687.40
  6. Step 6: Final answer
    x = 242,724.27

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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.