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Finding the Fourth Proportional to 331,495.80, 497,243.70 and 279,007.80

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Solution

The fourth proportional to 331,495.80, 497,243.70 and 279,007.80 is: 418,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,495.80 : 497,243.70 = 279,007.80 : x
  2. Step 2: Convert to fraction form
    331,495.80/497,243.70 = 279,007.80/x
  3. Step 3: Cross multiply
    331,495.80x = 497,243.70 × 279,007.80
  4. Step 4: Simplify right side
    331,495.80x = 138,734,870,800.86
  5. Step 5: Solve for x
    x = 138,734,870,800.86/331,495.80
  6. Step 6: Final answer
    x = 418,511.70

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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.