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Finding the Fourth Proportional to 641,539.40, 961,272.30 and 404,457.80

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Solution

The fourth proportional to 641,539.40, 961,272.30 and 404,457.80 is: 606,033.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,539.40 : 961,272.30 = 404,457.80 : x
  2. Step 2: Convert to fraction form
    641,539.40/961,272.30 = 404,457.80/x
  3. Step 3: Cross multiply
    641,539.40x = 961,272.30 × 404,457.80
  4. Step 4: Simplify right side
    641,539.40x = 388,794,079,658.94
  5. Step 5: Solve for x
    x = 388,794,079,658.94/641,539.40
  6. Step 6: Final answer
    x = 606,033.05

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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.