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Finding the Fourth Proportional to 638,449.62, 955,308.86 and 511,705.46

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Solution

The fourth proportional to 638,449.62, 955,308.86 and 511,705.46 is: 765,662.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,449.62 : 955,308.86 = 511,705.46 : x
  2. Step 2: Convert to fraction form
    638,449.62/955,308.86 = 511,705.46/x
  3. Step 3: Cross multiply
    638,449.62x = 955,308.86 × 511,705.46
  4. Step 4: Simplify right side
    638,449.62x = 488,836,759,648.38
  5. Step 5: Solve for x
    x = 488,836,759,648.38/638,449.62
  6. Step 6: Final answer
    x = 765,662.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.