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Finding the Fourth Proportional to 627,280.25, 865,652.84 and 355,342.33

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Solution

The fourth proportional to 627,280.25, 865,652.84 and 355,342.33 is: 490,375.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,280.25 : 865,652.84 = 355,342.33 : x
  2. Step 2: Convert to fraction form
    627,280.25/865,652.84 = 355,342.33/x
  3. Step 3: Cross multiply
    627,280.25x = 865,652.84 × 355,342.33
  4. Step 4: Simplify right side
    627,280.25x = 307,603,097,136.72
  5. Step 5: Solve for x
    x = 307,603,097,136.72/627,280.25
  6. Step 6: Final answer
    x = 490,375.87

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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.