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Finding the Fourth Proportional to 442,818.40, 664,141.20 and 143,226.40

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Solution

The fourth proportional to 442,818.40, 664,141.20 and 143,226.40 is: 214,811.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,818.40 : 664,141.20 = 143,226.40 : x
  2. Step 2: Convert to fraction form
    442,818.40/664,141.20 = 143,226.40/x
  3. Step 3: Cross multiply
    442,818.40x = 664,141.20 × 143,226.40
  4. Step 4: Simplify right side
    442,818.40x = 95,122,553,167.68
  5. Step 5: Solve for x
    x = 95,122,553,167.68/442,818.40
  6. Step 6: Final answer
    x = 214,811.65

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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.