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Finding the Fourth Proportional to 489,231.21, 675,212.88 and 298,355.31

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Solution

The fourth proportional to 489,231.21, 675,212.88 and 298,355.31 is: 411,775.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,231.21 : 675,212.88 = 298,355.31 : x
  2. Step 2: Convert to fraction form
    489,231.21/675,212.88 = 298,355.31/x
  3. Step 3: Cross multiply
    489,231.21x = 675,212.88 × 298,355.31
  4. Step 4: Simplify right side
    489,231.21x = 201,453,348,128.39
  5. Step 5: Solve for x
    x = 201,453,348,128.39/489,231.21
  6. Step 6: Final answer
    x = 411,775.34

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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.