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Finding the Fourth Proportional to 354,615.76, 489,298.08 and 225,605.44

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Solution

The fourth proportional to 354,615.76, 489,298.08 and 225,605.44 is: 311,289.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,615.76 : 489,298.08 = 225,605.44 : x
  2. Step 2: Convert to fraction form
    354,615.76/489,298.08 = 225,605.44/x
  3. Step 3: Cross multiply
    354,615.76x = 489,298.08 × 225,605.44
  4. Step 4: Simplify right side
    354,615.76x = 110,388,308,629.56
  5. Step 5: Solve for x
    x = 110,388,308,629.56/354,615.76
  6. Step 6: Final answer
    x = 311,289.91

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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.