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Finding the Fourth Proportional to 640,992.64, 884,553.60 and 354,505.60

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Solution

The fourth proportional to 640,992.64, 884,553.60 and 354,505.60 is: 489,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,992.64 : 884,553.60 = 354,505.60 : x
  2. Step 2: Convert to fraction form
    640,992.64/884,553.60 = 354,505.60/x
  3. Step 3: Cross multiply
    640,992.64x = 884,553.60 × 354,505.60
  4. Step 4: Simplify right side
    640,992.64x = 313,579,204,700.16
  5. Step 5: Solve for x
    x = 313,579,204,700.16/640,992.64
  6. Step 6: Final answer
    x = 489,208.74

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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.