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Finding the Fourth Proportional to 640,627.31, 883,988.94 and 354,108.44

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Solution

The fourth proportional to 640,627.31, 883,988.94 and 354,108.44 is: 488,627.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,627.31 : 883,988.94 = 354,108.44 : x
  2. Step 2: Convert to fraction form
    640,627.31/883,988.94 = 354,108.44/x
  3. Step 3: Cross multiply
    640,627.31x = 883,988.94 × 354,108.44
  4. Step 4: Simplify right side
    640,627.31x = 313,027,948,058.53
  5. Step 5: Solve for x
    x = 313,027,948,058.53/640,627.31
  6. Step 6: Final answer
    x = 488,627.23

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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.