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Finding the Fourth Proportional to 443,012.20, 664,518.30 and 162,638.80

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Solution

The fourth proportional to 443,012.20, 664,518.30 and 162,638.80 is: 243,958.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,012.20 : 664,518.30 = 162,638.80 : x
  2. Step 2: Convert to fraction form
    443,012.20/664,518.30 = 162,638.80/x
  3. Step 3: Cross multiply
    443,012.20x = 664,518.30 × 162,638.80
  4. Step 4: Simplify right side
    443,012.20x = 108,076,458,890.04
  5. Step 5: Solve for x
    x = 108,076,458,890.04/443,012.20
  6. Step 6: Final answer
    x = 243,958.20

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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.