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Finding the Fourth Proportional to 461,172.60, 636,321.42 and 279,979.92

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Solution

The fourth proportional to 461,172.60, 636,321.42 and 279,979.92 is: 386,313.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,172.60 : 636,321.42 = 279,979.92 : x
  2. Step 2: Convert to fraction form
    461,172.60/636,321.42 = 279,979.92/x
  3. Step 3: Cross multiply
    461,172.60x = 636,321.42 × 279,979.92
  4. Step 4: Simplify right side
    461,172.60x = 178,157,220,265.89
  5. Step 5: Solve for x
    x = 178,157,220,265.89/461,172.60
  6. Step 6: Final answer
    x = 386,313.54

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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.