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Finding the Fourth Proportional to 641,301.40, 960,915.30 and 404,219.80

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Solution

The fourth proportional to 641,301.40, 960,915.30 and 404,219.80 is: 605,676.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,301.40 : 960,915.30 = 404,219.80 : x
  2. Step 2: Convert to fraction form
    641,301.40/960,915.30 = 404,219.80/x
  3. Step 3: Cross multiply
    641,301.40x = 960,915.30 × 404,219.80
  4. Step 4: Simplify right side
    641,301.40x = 388,420,990,382.94
  5. Step 5: Solve for x
    x = 388,420,990,382.94/641,301.40
  6. Step 6: Final answer
    x = 605,676.19

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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.