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Finding the Fourth Proportional to 640,699.56, 884,087.46 and 354,179.88

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Solution

The fourth proportional to 640,699.56, 884,087.46 and 354,179.88 is: 488,725.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,699.56 : 884,087.46 = 354,179.88 : x
  2. Step 2: Convert to fraction form
    640,699.56/884,087.46 = 354,179.88/x
  3. Step 3: Cross multiply
    640,699.56x = 884,087.46 × 354,179.88
  4. Step 4: Simplify right side
    640,699.56x = 313,125,990,492.31
  5. Step 5: Solve for x
    x = 313,125,990,492.31/640,699.56
  6. Step 6: Final answer
    x = 488,725.15

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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.