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Finding the Fourth Proportional to 479,608.64, 661,757.28 and 278,296.64

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Solution

The fourth proportional to 479,608.64, 661,757.28 and 278,296.64 is: 383,989.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,608.64 : 661,757.28 = 278,296.64 : x
  2. Step 2: Convert to fraction form
    479,608.64/661,757.28 = 278,296.64/x
  3. Step 3: Cross multiply
    479,608.64x = 661,757.28 × 278,296.64
  4. Step 4: Simplify right side
    479,608.64x = 184,164,827,519.54
  5. Step 5: Solve for x
    x = 184,164,827,519.54/479,608.64
  6. Step 6: Final answer
    x = 383,989.80

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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.