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Finding the Fourth Proportional to 442,928.40, 664,489.80 and 143,422.80

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Solution

The fourth proportional to 442,928.40, 664,489.80 and 143,422.80 is: 215,165.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,928.40 : 664,489.80 = 143,422.80 : x
  2. Step 2: Convert to fraction form
    442,928.40/664,489.80 = 143,422.80/x
  3. Step 3: Cross multiply
    442,928.40x = 664,489.80 × 143,422.80
  4. Step 4: Simplify right side
    442,928.40x = 95,302,987,687.44
  5. Step 5: Solve for x
    x = 95,302,987,687.44/442,928.40
  6. Step 6: Final answer
    x = 215,165.67

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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.