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Finding the Fourth Proportional to 443,791.60, 665,687.40 and 368,996.20

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Solution

The fourth proportional to 443,791.60, 665,687.40 and 368,996.20 is: 553,494.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,791.60 : 665,687.40 = 368,996.20 : x
  2. Step 2: Convert to fraction form
    443,791.60/665,687.40 = 368,996.20/x
  3. Step 3: Cross multiply
    443,791.60x = 665,687.40 × 368,996.20
  4. Step 4: Simplify right side
    443,791.60x = 245,636,120,987.88
  5. Step 5: Solve for x
    x = 245,636,120,987.88/443,791.60
  6. Step 6: Final answer
    x = 553,494.30

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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.