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Finding the Fourth Proportional to 320,215.05, 480,321.93 and 300,728.88

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Solution

The fourth proportional to 320,215.05, 480,321.93 and 300,728.88 is: 451,092.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,215.05 : 480,321.93 = 300,728.88 : x
  2. Step 2: Convert to fraction form
    320,215.05/480,321.93 = 300,728.88/x
  3. Step 3: Cross multiply
    320,215.05x = 480,321.93 × 300,728.88
  4. Step 4: Simplify right side
    320,215.05x = 144,446,676,048.34
  5. Step 5: Solve for x
    x = 144,446,676,048.34/320,215.05
  6. Step 6: Final answer
    x = 451,092.71

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1.5x scale

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.