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Finding the Fourth Proportional to 488,361.15, 673,769.68 and 307,086.86

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Solution

The fourth proportional to 488,361.15, 673,769.68 and 307,086.86 is: 423,673.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,361.15 : 673,769.68 = 307,086.86 : x
  2. Step 2: Convert to fraction form
    488,361.15/673,769.68 = 307,086.86/x
  3. Step 3: Cross multiply
    488,361.15x = 673,769.68 × 307,086.86
  4. Step 4: Simplify right side
    488,361.15x = 206,905,816,311.11
  5. Step 5: Solve for x
    x = 206,905,816,311.11/488,361.15
  6. Step 6: Final answer
    x = 423,673.78

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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.