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Finding the Fourth Proportional to 443,010.30, 664,515.45 and 265,425.90

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Solution

The fourth proportional to 443,010.30, 664,515.45 and 265,425.90 is: 398,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,010.30 : 664,515.45 = 265,425.90 : x
  2. Step 2: Convert to fraction form
    443,010.30/664,515.45 = 265,425.90/x
  3. Step 3: Cross multiply
    443,010.30x = 664,515.45 × 265,425.90
  4. Step 4: Simplify right side
    443,010.30x = 176,379,611,380.16
  5. Step 5: Solve for x
    x = 176,379,611,380.16/443,010.30
  6. Step 6: Final answer
    x = 398,138.85

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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.