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Finding the Fourth Proportional to 640,629.75, 883,992.31 and 354,110.88

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Solution

The fourth proportional to 640,629.75, 883,992.31 and 354,110.88 is: 488,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,629.75 : 883,992.31 = 354,110.88 : x
  2. Step 2: Convert to fraction form
    640,629.75/883,992.31 = 354,110.88/x
  3. Step 3: Cross multiply
    640,629.75x = 883,992.31 × 354,110.88
  4. Step 4: Simplify right side
    640,629.75x = 313,031,293,922.06
  5. Step 5: Solve for x
    x = 313,031,293,922.06/640,629.75
  6. Step 6: Final answer
    x = 488,630.59

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1.5x scale

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.