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Finding the Fourth Proportional to 320,502.42, 480,414.65 and 120,736.44

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Solution

The fourth proportional to 320,502.42, 480,414.65 and 120,736.44 is: 180,976.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,502.42 : 480,414.65 = 120,736.44 : x
  2. Step 2: Convert to fraction form
    320,502.42/480,414.65 = 120,736.44/x
  3. Step 3: Cross multiply
    320,502.42x = 480,414.65 × 120,736.44
  4. Step 4: Simplify right side
    320,502.42x = 58,003,553,961.16
  5. Step 5: Solve for x
    x = 58,003,553,961.16/320,502.42
  6. Step 6: Final answer
    x = 180,976.96

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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.