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Finding the Fourth Proportional to 721,375, 1,081,359.30 and 300,771.16

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Solution

The fourth proportional to 721,375, 1,081,359.30 and 300,771.16 is: 450,863.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,375 : 1,081,359.30 = 300,771.16 : x
  2. Step 2: Convert to fraction form
    721,375/1,081,359.30 = 300,771.16/x
  3. Step 3: Cross multiply
    721,375x = 1,081,359.30 × 300,771.16
  4. Step 4: Simplify right side
    721,375x = 325,241,691,037.79
  5. Step 5: Solve for x
    x = 325,241,691,037.79/721,375
  6. Step 6: Final answer
    x = 450,863.55

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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.