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Finding the Fourth Proportional to 489,607.92, 675,485.73 and 319,940.46

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Solution

The fourth proportional to 489,607.92, 675,485.73 and 319,940.46 is: 441,404.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,607.92 : 675,485.73 = 319,940.46 : x
  2. Step 2: Convert to fraction form
    489,607.92/675,485.73 = 319,940.46/x
  3. Step 3: Cross multiply
    489,607.92x = 675,485.73 × 319,940.46
  4. Step 4: Simplify right side
    489,607.92x = 216,115,215,179.64
  5. Step 5: Solve for x
    x = 216,115,215,179.64/489,607.92
  6. Step 6: Final answer
    x = 441,404.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.