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Finding the Fourth Proportional to 443,486.90, 665,165.55 and 127,910.90

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Solution

The fourth proportional to 443,486.90, 665,165.55 and 127,910.90 is: 191,847.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,486.90 : 665,165.55 = 127,910.90 : x
  2. Step 2: Convert to fraction form
    443,486.90/665,165.55 = 127,910.90/x
  3. Step 3: Cross multiply
    443,486.90x = 665,165.55 × 127,910.90
  4. Step 4: Simplify right side
    443,486.90x = 85,081,924,149.50
  5. Step 5: Solve for x
    x = 85,081,924,149.50/443,486.90
  6. Step 6: Final answer
    x = 191,847.66

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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.