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Finding the Fourth Proportional to 308,930.92, 426,104.82 and 283,519.29

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Solution

The fourth proportional to 308,930.92, 426,104.82 and 283,519.29 is: 391,054.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,930.92 : 426,104.82 = 283,519.29 : x
  2. Step 2: Convert to fraction form
    308,930.92/426,104.82 = 283,519.29/x
  3. Step 3: Cross multiply
    308,930.92x = 426,104.82 × 283,519.29
  4. Step 4: Simplify right side
    308,930.92x = 120,808,936,031.98
  5. Step 5: Solve for x
    x = 120,808,936,031.98/308,930.92
  6. Step 6: Final answer
    x = 391,054.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.