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Finding the Fourth Proportional to 485,463.12, 728,440.63 and 323,467.89

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Solution

The fourth proportional to 485,463.12, 728,440.63 and 323,467.89 is: 485,365.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,463.12 : 728,440.63 = 323,467.89 : x
  2. Step 2: Convert to fraction form
    485,463.12/728,440.63 = 323,467.89/x
  3. Step 3: Cross multiply
    485,463.12x = 728,440.63 × 323,467.89
  4. Step 4: Simplify right side
    485,463.12x = 235,627,151,855.56
  5. Step 5: Solve for x
    x = 235,627,151,855.56/485,463.12
  6. Step 6: Final answer
    x = 485,365.71

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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.