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Finding the Fourth Proportional to 443,807.28, 611,163.96 and 385,639.56

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Solution

The fourth proportional to 443,807.28, 611,163.96 and 385,639.56 is: 531,061.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,807.28 : 611,163.96 = 385,639.56 : x
  2. Step 2: Convert to fraction form
    443,807.28/611,163.96 = 385,639.56/x
  3. Step 3: Cross multiply
    443,807.28x = 611,163.96 × 385,639.56
  4. Step 4: Simplify right side
    443,807.28x = 235,689,000,622.26
  5. Step 5: Solve for x
    x = 235,689,000,622.26/443,807.28
  6. Step 6: Final answer
    x = 531,061.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.