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Finding the Fourth Proportional to 377,879.70, 521,449.92 and 208,113.78

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Solution

The fourth proportional to 377,879.70, 521,449.92 and 208,113.78 is: 287,183.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,879.70 : 521,449.92 = 208,113.78 : x
  2. Step 2: Convert to fraction form
    377,879.70/521,449.92 = 208,113.78/x
  3. Step 3: Cross multiply
    377,879.70x = 521,449.92 × 208,113.78
  4. Step 4: Simplify right side
    377,879.70x = 108,520,913,931.90
  5. Step 5: Solve for x
    x = 108,520,913,931.90/377,879.70
  6. Step 6: Final answer
    x = 287,183.76

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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.