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Finding the Fourth Proportional to 627,005.75, 865,321.29 and 355,122

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Solution

The fourth proportional to 627,005.75, 865,321.29 and 355,122 is: 490,098.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,005.75 : 865,321.29 = 355,122 : x
  2. Step 2: Convert to fraction form
    627,005.75/865,321.29 = 355,122/x
  3. Step 3: Cross multiply
    627,005.75x = 865,321.29 × 355,122
  4. Step 4: Simplify right side
    627,005.75x = 307,294,627,147.38
  5. Step 5: Solve for x
    x = 307,294,627,147.38/627,005.75
  6. Step 6: Final answer
    x = 490,098.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.