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Finding the Fourth Proportional to 443,609.40, 665,414.10 and 163,090.20

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Solution

The fourth proportional to 443,609.40, 665,414.10 and 163,090.20 is: 244,635.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,609.40 : 665,414.10 = 163,090.20 : x
  2. Step 2: Convert to fraction form
    443,609.40/665,414.10 = 163,090.20/x
  3. Step 3: Cross multiply
    443,609.40x = 665,414.10 × 163,090.20
  4. Step 4: Simplify right side
    443,609.40x = 108,522,518,651.82
  5. Step 5: Solve for x
    x = 108,522,518,651.82/443,609.40
  6. Step 6: Final answer
    x = 244,635.30

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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.