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Finding the Fourth Proportional to 404,539.80, 606,930.42 and 120,239.78

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Solution

The fourth proportional to 404,539.80, 606,930.42 and 120,239.78 is: 180,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,539.80 : 606,930.42 = 120,239.78 : x
  2. Step 2: Convert to fraction form
    404,539.80/606,930.42 = 120,239.78/x
  3. Step 3: Cross multiply
    404,539.80x = 606,930.42 × 120,239.78
  4. Step 4: Simplify right side
    404,539.80x = 72,977,180,176.11
  5. Step 5: Solve for x
    x = 72,977,180,176.11/404,539.80
  6. Step 6: Final answer
    x = 180,395.55

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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.