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Finding the Fourth Proportional to 442,807.20, 664,297.20 and 190,087.20

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Solution

The fourth proportional to 442,807.20, 664,297.20 and 190,087.20 is: 285,167.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,807.20 : 664,297.20 = 190,087.20 : x
  2. Step 2: Convert to fraction form
    442,807.20/664,297.20 = 190,087.20/x
  3. Step 3: Cross multiply
    442,807.20x = 664,297.20 × 190,087.20
  4. Step 4: Simplify right side
    442,807.20x = 126,274,394,715.84
  5. Step 5: Solve for x
    x = 126,274,394,715.84/442,807.20
  6. Step 6: Final answer
    x = 285,167.89

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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.