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Finding the Fourth Proportional to 442,149.20, 663,223.80 and 146,661.20

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Solution

The fourth proportional to 442,149.20, 663,223.80 and 146,661.20 is: 219,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,149.20 : 663,223.80 = 146,661.20 : x
  2. Step 2: Convert to fraction form
    442,149.20/663,223.80 = 146,661.20/x
  3. Step 3: Cross multiply
    442,149.20x = 663,223.80 × 146,661.20
  4. Step 4: Simplify right side
    442,149.20x = 97,269,198,376.56
  5. Step 5: Solve for x
    x = 97,269,198,376.56/442,149.20
  6. Step 6: Final answer
    x = 219,991.80

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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.