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Finding the Fourth Proportional to 638,020.80, 955,850.40 and 371,908.80

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Solution

The fourth proportional to 638,020.80, 955,850.40 and 371,908.80 is: 557,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,020.80 : 955,850.40 = 371,908.80 : x
  2. Step 2: Convert to fraction form
    638,020.80/955,850.40 = 371,908.80/x
  3. Step 3: Cross multiply
    638,020.80x = 955,850.40 × 371,908.80
  4. Step 4: Simplify right side
    638,020.80x = 355,489,175,243.52
  5. Step 5: Solve for x
    x = 355,489,175,243.52/638,020.80
  6. Step 6: Final answer
    x = 557,174.90

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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.