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Finding the Fourth Proportional to 442,818.70, 664,228.05 and 143,321.20

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Solution

The fourth proportional to 442,818.70, 664,228.05 and 143,321.20 is: 214,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,818.70 : 664,228.05 = 143,321.20 : x
  2. Step 2: Convert to fraction form
    442,818.70/664,228.05 = 143,321.20/x
  3. Step 3: Cross multiply
    442,818.70x = 664,228.05 × 143,321.20
  4. Step 4: Simplify right side
    442,818.70x = 95,197,961,199.66
  5. Step 5: Solve for x
    x = 95,197,961,199.66/442,818.70
  6. Step 6: Final answer
    x = 214,981.80

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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.