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Finding the Fourth Proportional to 531,163.28, 732,995.78 and 289,447.80

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Solution

The fourth proportional to 531,163.28, 732,995.78 and 289,447.80 is: 399,432.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,163.28 : 732,995.78 = 289,447.80 : x
  2. Step 2: Convert to fraction form
    531,163.28/732,995.78 = 289,447.80/x
  3. Step 3: Cross multiply
    531,163.28x = 732,995.78 × 289,447.80
  4. Step 4: Simplify right side
    531,163.28x = 212,164,015,930.28
  5. Step 5: Solve for x
    x = 212,164,015,930.28/531,163.28
  6. Step 6: Final answer
    x = 399,432.76

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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.