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Finding the Fourth Proportional to 442,922.40, 664,480.80 and 143,416.80

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Solution

The fourth proportional to 442,922.40, 664,480.80 and 143,416.80 is: 215,156.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,922.40 : 664,480.80 = 143,416.80 : x
  2. Step 2: Convert to fraction form
    442,922.40/664,480.80 = 143,416.80/x
  3. Step 3: Cross multiply
    442,922.40x = 664,480.80 × 143,416.80
  4. Step 4: Simplify right side
    442,922.40x = 95,297,709,997.44
  5. Step 5: Solve for x
    x = 95,297,709,997.44/442,922.40
  6. Step 6: Final answer
    x = 215,156.67

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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.