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Finding the Fourth Proportional to 486,212.21, 728,940.63 and 315,072.39

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Solution

The fourth proportional to 486,212.21, 728,940.63 and 315,072.39 is: 472,363.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,212.21 : 728,940.63 = 315,072.39 : x
  2. Step 2: Convert to fraction form
    486,212.21/728,940.63 = 315,072.39/x
  3. Step 3: Cross multiply
    486,212.21x = 728,940.63 × 315,072.39
  4. Step 4: Simplify right side
    486,212.21x = 229,669,066,462.21
  5. Step 5: Solve for x
    x = 229,669,066,462.21/486,212.21
  6. Step 6: Final answer
    x = 472,363.84

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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.