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Finding the Fourth Proportional to 351,765.64, 485,445.45 and 215,874.64

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Solution

The fourth proportional to 351,765.64, 485,445.45 and 215,874.64 is: 297,912.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,765.64 : 485,445.45 = 215,874.64 : x
  2. Step 2: Convert to fraction form
    351,765.64/485,445.45 = 215,874.64/x
  3. Step 3: Cross multiply
    351,765.64x = 485,445.45 × 215,874.64
  4. Step 4: Simplify right side
    351,765.64x = 104,795,361,758.39
  5. Step 5: Solve for x
    x = 104,795,361,758.39/351,765.64
  6. Step 6: Final answer
    x = 297,912.44

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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.