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Finding the Fourth Proportional to 641,299.40, 960,912.30 and 404,217.80

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Solution

The fourth proportional to 641,299.40, 960,912.30 and 404,217.80 is: 605,673.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,299.40 : 960,912.30 = 404,217.80 : x
  2. Step 2: Convert to fraction form
    641,299.40/960,912.30 = 404,217.80/x
  3. Step 3: Cross multiply
    641,299.40x = 960,912.30 × 404,217.80
  4. Step 4: Simplify right side
    641,299.40x = 388,417,855,898.94
  5. Step 5: Solve for x
    x = 388,417,855,898.94/641,299.40
  6. Step 6: Final answer
    x = 605,673.19

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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.