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Finding the Fourth Proportional to 443,999.90, 665,234.40 and 206,856.20

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Solution

The fourth proportional to 443,999.90, 665,234.40 and 206,856.20 is: 309,927.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,999.90 : 665,234.40 = 206,856.20 : x
  2. Step 2: Convert to fraction form
    443,999.90/665,234.40 = 206,856.20/x
  3. Step 3: Cross multiply
    443,999.90x = 665,234.40 × 206,856.20
  4. Step 4: Simplify right side
    443,999.90x = 137,607,860,093.28
  5. Step 5: Solve for x
    x = 137,607,860,093.28/443,999.90
  6. Step 6: Final answer
    x = 309,927.68

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1.5x scale

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.