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Finding the Fourth Proportional to 354,877.54, 489,906.63 and 218,986.34

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Solution

The fourth proportional to 354,877.54, 489,906.63 and 218,986.34 is: 302,309.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,877.54 : 489,906.63 = 218,986.34 : x
  2. Step 2: Convert to fraction form
    354,877.54/489,906.63 = 218,986.34/x
  3. Step 3: Cross multiply
    354,877.54x = 489,906.63 × 218,986.34
  4. Step 4: Simplify right side
    354,877.54x = 107,282,857,395.90
  5. Step 5: Solve for x
    x = 107,282,857,395.90/354,877.54
  6. Step 6: Final answer
    x = 302,309.52

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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.