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Finding the Fourth Proportional to 377,809.50, 521,377.12 and 208,043.22

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Solution

The fourth proportional to 377,809.50, 521,377.12 and 208,043.22 is: 287,099.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,809.50 : 521,377.12 = 208,043.22 : x
  2. Step 2: Convert to fraction form
    377,809.50/521,377.12 = 208,043.22/x
  3. Step 3: Cross multiply
    377,809.50x = 521,377.12 × 208,043.22
  4. Step 4: Simplify right side
    377,809.50x = 108,468,974,879.13
  5. Step 5: Solve for x
    x = 108,468,974,879.13/377,809.50
  6. Step 6: Final answer
    x = 287,099.65

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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.