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Finding the Fourth Proportional to 481,781.12, 664,840.30 and 277,840.64

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Solution

The fourth proportional to 481,781.12, 664,840.30 and 277,840.64 is: 383,409.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,781.12 : 664,840.30 = 277,840.64 : x
  2. Step 2: Convert to fraction form
    481,781.12/664,840.30 = 277,840.64/x
  3. Step 3: Cross multiply
    481,781.12x = 664,840.30 × 277,840.64
  4. Step 4: Simplify right side
    481,781.12x = 184,719,654,449.79
  5. Step 5: Solve for x
    x = 184,719,654,449.79/481,781.12
  6. Step 6: Final answer
    x = 383,409.91

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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.