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Finding the Fourth Proportional to 354,485.27, 489,269.09 and 225,398.81

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Solution

The fourth proportional to 354,485.27, 489,269.09 and 225,398.81 is: 311,100.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,485.27 : 489,269.09 = 225,398.81 : x
  2. Step 2: Convert to fraction form
    354,485.27/489,269.09 = 225,398.81/x
  3. Step 3: Cross multiply
    354,485.27x = 489,269.09 × 225,398.81
  4. Step 4: Simplify right side
    354,485.27x = 110,280,670,655.78
  5. Step 5: Solve for x
    x = 110,280,670,655.78/354,485.27
  6. Step 6: Final answer
    x = 311,100.86

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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.