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Finding the Fourth Proportional to 443,857.76, 665,791.48 and 128,317.36

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Solution

The fourth proportional to 443,857.76, 665,791.48 and 128,317.36 is: 192,477.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,857.76 : 665,791.48 = 128,317.36 : x
  2. Step 2: Convert to fraction form
    443,857.76/665,791.48 = 128,317.36/x
  3. Step 3: Cross multiply
    443,857.76x = 665,791.48 × 128,317.36
  4. Step 4: Simplify right side
    443,857.76x = 85,432,605,024.09
  5. Step 5: Solve for x
    x = 85,432,605,024.09/443,857.76
  6. Step 6: Final answer
    x = 192,477.44

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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.