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Finding the Fourth Proportional to 479,091.36, 661,138.32 and 275,146.56

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Solution

The fourth proportional to 479,091.36, 661,138.32 and 275,146.56 is: 379,697.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,091.36 : 661,138.32 = 275,146.56 : x
  2. Step 2: Convert to fraction form
    479,091.36/661,138.32 = 275,146.56/x
  3. Step 3: Cross multiply
    479,091.36x = 661,138.32 × 275,146.56
  4. Step 4: Simplify right side
    479,091.36x = 181,909,934,432.18
  5. Step 5: Solve for x
    x = 181,909,934,432.18/479,091.36
  6. Step 6: Final answer
    x = 379,697.80

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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.