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Finding the Fourth Proportional to 443,215.20, 664,390.80 and 253,480.80

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Solution

The fourth proportional to 443,215.20, 664,390.80 and 253,480.80 is: 379,974.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,215.20 : 664,390.80 = 253,480.80 : x
  2. Step 2: Convert to fraction form
    443,215.20/664,390.80 = 253,480.80/x
  3. Step 3: Cross multiply
    443,215.20x = 664,390.80 × 253,480.80
  4. Step 4: Simplify right side
    443,215.20x = 168,410,311,496.64
  5. Step 5: Solve for x
    x = 168,410,311,496.64/443,215.20
  6. Step 6: Final answer
    x = 379,974.13

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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.