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Finding the Fourth Proportional to 379,230.72, 568,930.92 and 142,575.45

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Solution

The fourth proportional to 379,230.72, 568,930.92 and 142,575.45 is: 213,895.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,230.72 : 568,930.92 = 142,575.45 : x
  2. Step 2: Convert to fraction form
    379,230.72/568,930.92 = 142,575.45/x
  3. Step 3: Cross multiply
    379,230.72x = 568,930.92 × 142,575.45
  4. Step 4: Simplify right side
    379,230.72x = 81,115,581,937.91
  5. Step 5: Solve for x
    x = 81,115,581,937.91/379,230.72
  6. Step 6: Final answer
    x = 213,895.07

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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.