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Finding the Fourth Proportional to 442,912.40, 664,282.20 and 143,320.40

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Solution

The fourth proportional to 442,912.40, 664,282.20 and 143,320.40 is: 214,952.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,912.40 : 664,282.20 = 143,320.40 : x
  2. Step 2: Convert to fraction form
    442,912.40/664,282.20 = 143,320.40/x
  3. Step 3: Cross multiply
    442,912.40x = 664,282.20 × 143,320.40
  4. Step 4: Simplify right side
    442,912.40x = 95,205,190,616.88
  5. Step 5: Solve for x
    x = 95,205,190,616.88/442,912.40
  6. Step 6: Final answer
    x = 214,952.64

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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.