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Finding the Fourth Proportional to 325,874.90, 488,812.35 and 220,121.30

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Solution

The fourth proportional to 325,874.90, 488,812.35 and 220,121.30 is: 330,181.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,874.90 : 488,812.35 = 220,121.30 : x
  2. Step 2: Convert to fraction form
    325,874.90/488,812.35 = 220,121.30/x
  3. Step 3: Cross multiply
    325,874.90x = 488,812.35 × 220,121.30
  4. Step 4: Simplify right side
    325,874.90x = 107,598,009,938.06
  5. Step 5: Solve for x
    x = 107,598,009,938.06/325,874.90
  6. Step 6: Final answer
    x = 330,181.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.