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Finding the Fourth Proportional to 478,640.73, 660,520.83 and 263,781.03

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Solution

The fourth proportional to 478,640.73, 660,520.83 and 263,781.03 is: 364,015.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,640.73 : 660,520.83 = 263,781.03 : x
  2. Step 2: Convert to fraction form
    478,640.73/660,520.83 = 263,781.03/x
  3. Step 3: Cross multiply
    478,640.73x = 660,520.83 × 263,781.03
  4. Step 4: Simplify right side
    478,640.73x = 174,232,864,873.86
  5. Step 5: Solve for x
    x = 174,232,864,873.86/478,640.73
  6. Step 6: Final answer
    x = 364,015.96

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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.