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Finding the Fourth Proportional to 641,538.40, 961,270.80 and 404,456.80

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Solution

The fourth proportional to 641,538.40, 961,270.80 and 404,456.80 is: 606,031.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,538.40 : 961,270.80 = 404,456.80 : x
  2. Step 2: Convert to fraction form
    641,538.40/961,270.80 = 404,456.80/x
  3. Step 3: Cross multiply
    641,538.40x = 961,270.80 × 404,456.80
  4. Step 4: Simplify right side
    641,538.40x = 388,792,511,701.44
  5. Step 5: Solve for x
    x = 388,792,511,701.44/641,538.40
  6. Step 6: Final answer
    x = 606,031.55

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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.