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Finding the Fourth Proportional to 320,648.22, 480,600.54 and 120,840.66

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Solution

The fourth proportional to 320,648.22, 480,600.54 and 120,840.66 is: 181,120.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,648.22 : 480,600.54 = 120,840.66 : x
  2. Step 2: Convert to fraction form
    320,648.22/480,600.54 = 120,840.66/x
  3. Step 3: Cross multiply
    320,648.22x = 480,600.54 × 120,840.66
  4. Step 4: Simplify right side
    320,648.22x = 58,076,086,449.96
  5. Step 5: Solve for x
    x = 58,076,086,449.96/320,648.22
  6. Step 6: Final answer
    x = 181,120.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.