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Finding the Fourth Proportional to 443,201.10, 664,807.05 and 143,679.30

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Solution

The fourth proportional to 443,201.10, 664,807.05 and 143,679.30 is: 215,520.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,201.10 : 664,807.05 = 143,679.30 : x
  2. Step 2: Convert to fraction form
    443,201.10/664,807.05 = 143,679.30/x
  3. Step 3: Cross multiply
    443,201.10x = 664,807.05 × 143,679.30
  4. Step 4: Simplify right side
    443,201.10x = 95,519,011,579.07
  5. Step 5: Solve for x
    x = 95,519,011,579.07/443,201.10
  6. Step 6: Final answer
    x = 215,520.70

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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.