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Finding the Fourth Proportional to 318,964.92, 478,495.89 and 108,553.65

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Solution

The fourth proportional to 318,964.92, 478,495.89 and 108,553.65 is: 162,846.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,964.92 : 478,495.89 = 108,553.65 : x
  2. Step 2: Convert to fraction form
    318,964.92/478,495.89 = 108,553.65/x
  3. Step 3: Cross multiply
    318,964.92x = 478,495.89 × 108,553.65
  4. Step 4: Simplify right side
    318,964.92x = 51,942,475,369.50
  5. Step 5: Solve for x
    x = 51,942,475,369.50/318,964.92
  6. Step 6: Final answer
    x = 162,846.98

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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.