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Finding the Fourth Proportional to 443,143.70, 664,576.11 and 143,554.76

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Solution

The fourth proportional to 443,143.70, 664,576.11 and 143,554.76 is: 215,286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,143.70 : 664,576.11 = 143,554.76 : x
  2. Step 2: Convert to fraction form
    443,143.70/664,576.11 = 143,554.76/x
  3. Step 3: Cross multiply
    443,143.70x = 664,576.11 × 143,554.76
  4. Step 4: Simplify right side
    443,143.70x = 95,403,065,634.22
  5. Step 5: Solve for x
    x = 95,403,065,634.22/443,143.70
  6. Step 6: Final answer
    x = 215,286.98

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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.