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Finding the Fourth Proportional to 381,644.60, 572,466.90 and 115,446.20

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Solution

The fourth proportional to 381,644.60, 572,466.90 and 115,446.20 is: 173,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,644.60 : 572,466.90 = 115,446.20 : x
  2. Step 2: Convert to fraction form
    381,644.60/572,466.90 = 115,446.20/x
  3. Step 3: Cross multiply
    381,644.60x = 572,466.90 × 115,446.20
  4. Step 4: Simplify right side
    381,644.60x = 66,089,128,230.78
  5. Step 5: Solve for x
    x = 66,089,128,230.78/381,644.60
  6. Step 6: Final answer
    x = 173,169.30

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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.