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Finding the Fourth Proportional to 489,940.86, 733,628.22 and 320,929.50

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Solution

The fourth proportional to 489,940.86, 733,628.22 and 320,929.50 is: 480,553.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,940.86 : 733,628.22 = 320,929.50 : x
  2. Step 2: Convert to fraction form
    489,940.86/733,628.22 = 320,929.50/x
  3. Step 3: Cross multiply
    489,940.86x = 733,628.22 × 320,929.50
  4. Step 4: Simplify right side
    489,940.86x = 235,442,937,830.49
  5. Step 5: Solve for x
    x = 235,442,937,830.49/489,940.86
  6. Step 6: Final answer
    x = 480,553.79

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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.