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Finding the Fourth Proportional to 396,990.81, 595,423.68 and 329,953.28

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Solution

The fourth proportional to 396,990.81, 595,423.68 and 329,953.28 is: 494,877.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,990.81 : 595,423.68 = 329,953.28 : x
  2. Step 2: Convert to fraction form
    396,990.81/595,423.68 = 329,953.28/x
  3. Step 3: Cross multiply
    396,990.81x = 595,423.68 × 329,953.28
  4. Step 4: Simplify right side
    396,990.81x = 196,461,993,228.55
  5. Step 5: Solve for x
    x = 196,461,993,228.55/396,990.81
  6. Step 6: Final answer
    x = 494,877.94

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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.