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Finding the Fourth Proportional to 627,255.94, 865,630.90 and 355,323.75

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Solution

The fourth proportional to 627,255.94, 865,630.90 and 355,323.75 is: 490,356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,255.94 : 865,630.90 = 355,323.75 : x
  2. Step 2: Convert to fraction form
    627,255.94/865,630.90 = 355,323.75/x
  3. Step 3: Cross multiply
    627,255.94x = 865,630.90 × 355,323.75
  4. Step 4: Simplify right side
    627,255.94x = 307,579,213,175.72
  5. Step 5: Solve for x
    x = 307,579,213,175.72/627,255.94
  6. Step 6: Final answer
    x = 490,356.80

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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.