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Finding the Fourth Proportional to 641,716.40, 961,537.80 and 404,634.80

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Solution

The fourth proportional to 641,716.40, 961,537.80 and 404,634.80 is: 606,298.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,716.40 : 961,537.80 = 404,634.80 : x
  2. Step 2: Convert to fraction form
    641,716.40/961,537.80 = 404,634.80/x
  3. Step 3: Cross multiply
    641,716.40x = 961,537.80 × 404,634.80
  4. Step 4: Simplify right side
    641,716.40x = 389,071,655,395.44
  5. Step 5: Solve for x
    x = 389,071,655,395.44/641,716.40
  6. Step 6: Final answer
    x = 606,298.44

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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.