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Finding the Fourth Proportional to 404,329.80, 605,328.30 and 392,665.80

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Solution

The fourth proportional to 404,329.80, 605,328.30 and 392,665.80 is: 587,865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,329.80 : 605,328.30 = 392,665.80 : x
  2. Step 2: Convert to fraction form
    404,329.80/605,328.30 = 392,665.80/x
  3. Step 3: Cross multiply
    404,329.80x = 605,328.30 × 392,665.80
  4. Step 4: Simplify right side
    404,329.80x = 237,691,721,182.14
  5. Step 5: Solve for x
    x = 237,691,721,182.14/404,329.80
  6. Step 6: Final answer
    x = 587,865.95

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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.