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Finding the Fourth Proportional to 443,380.20, 665,070.30 and 266,233.20

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Solution

The fourth proportional to 443,380.20, 665,070.30 and 266,233.20 is: 399,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,380.20 : 665,070.30 = 266,233.20 : x
  2. Step 2: Convert to fraction form
    443,380.20/665,070.30 = 266,233.20/x
  3. Step 3: Cross multiply
    443,380.20x = 665,070.30 × 266,233.20
  4. Step 4: Simplify right side
    443,380.20x = 177,063,794,193.96
  5. Step 5: Solve for x
    x = 177,063,794,193.96/443,380.20
  6. Step 6: Final answer
    x = 399,349.80

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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.